Pyrazines

Authors Drozd, KV; Manin, AN; Voronin, AP; Perlovich, GL in ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD published article about in [Drozd, K., V; Manin, A. N.; Voronin, A. P.; Perlovich, G. L.] RAS, GA Krestov Inst Solut Chem, Ivanovo 153045, Russia in 2021, Cited 70. Product Details of 98-97-5. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

The thermophysical characteristics and decomposition of pyrazinoic (POA), dipicolinic (DPA), and quinolinic (QNA) acids have been studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and mass-spectrometry. The transpiration method has been used to measure the vapour pressures as a function of the POA, DPA or QNA temperature. It has been found that QNA remains thermally stable in the solid form up to the temperature of 367.15 K, and further heating causes its decarboxylation and irreversible conversion to nicotinic acid. The standard molar enthalpies, entropies, and Gibbs energies of sublimation for POA, DPA and QNA have been calculated. A comparative study of five calculation schemes for sublimation enthalpy estimation (periodic Density Functional Theory computations (DFT-D3), Quantum Theory of Atoms in Molecules (QTAIM), Gavezzotti’s Coulomb-London-Pauli model (CLP and PIXEL) and CrystalExplorer CE-B3LYP) has been conducted. The sublimation thermodynamic functions of the compounds studied by the correlation method have been estimated. When applied to the objects of this study, the method proved to be a quick, convenient and inexpensive way to evaluate the sublimation thermodynamic functions of molecular crystals using only the melting temperature of the compound. (C) 2020 Elsevier Ltd.

Welcome to talk about 98-97-5, If you have any questions, you can contact Drozd, KV; Manin, AN; Voronin, AP; Perlovich, GL or send Email.. Product Details of 98-97-5

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

An article Pyrazinamide triggers degradation of its target aspartate decarboxylase WOS:000564272800001 published article about TUBERCULOSIS; RESISTANCE; MUTATIONS; PROTEASE; COMPLEX in [Gopal, Pooja; Sarathy, Jickky Palmae] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Med, Singapore, Singapore; [Yee, Michelle; Dick, Thomas] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Microbiol & Immunol, Singapore, Singapore; [Ragunathan, Priya; Shin, Joon; Bhushan, Shashi; Grueber, Gerhard] Nanyang Technol Univ, Sch Biol Sci, Singapore, Singapore; [Zhu, Junhao; Akopian, Tatos; Kandror, Olga; Rubin, Eric J.] Harvard Univ, Harvard TH Chan Sch Publ Hlth, Dept Immunol & Infect Dis, Boston, MA 02115 USA; [Lim, Teck Kwang; Lin, Qingsong] Natl Univ Singapore, Dept Biol Sci, Singapore, Singapore; [Gengenbacher, Martin; Dick, Thomas] Hackensack Meridian Hlth, Ctr Discovery & Innovat, Nutley, NJ 07110 USA; [Gengenbacher, Martin; Dick, Thomas] Seton Hall Univ, Dept Med Sci, Hackensack Meridian Med Sch, Nutley, NJ 07110 USA; [Gopal, Pooja] Merck Res Labs, MSD Translat Med Res Ctr, Singapore, Singapore in 2020, Cited 29. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5. Formula: C5H4N2O2

Pyrazinamide is a sterilizing first-line tuberculosis drug. Genetic, metabolomic and biophysical analyses previously demonstrated that pyrazinoic acid, the bioactive form of the prodrug pyrazinamide (PZA), interrupts biosynthesis of coenzyme A in Mycobacterium tuberculosis by binding to aspartate decarboxylase PanD. While most drugs act by inhibiting protein function upon target binding, we find here that pyrazinoic acid is only a weak enzyme inhibitor. We show that binding of pyrazinoic acid to PanD triggers degradation of the protein by the caseinolytic protease ClpC1-ClpP. Thus, the old tuberculosis drug pyrazinamide exerts anti-bacterial activity by acting as a target degrader, a mechanism of action that has recently emerged as a successful strategy in drug discovery across disease indications. Our findings provide the basis for the rational discovery of next generation PZA.

Formula: C5H4N2O2. Welcome to talk about 98-97-5, If you have any questions, you can contact Gopal, P; Sarathy, JP; Yee, M; Ragunathan, P; Shin, J; Bhushan, S; Zhu, JH; Akopian, T; Kandror, O; Lim, TK; Gengenbacher, M; Lin, QS; Rubin, EJ; Gruber, G; Dick, T or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Dumpala, RMR; Boda, A; Kumar, P; Rawat, N; Ali, SM in [Dumpala, Rama Mohana Rao; Rawat, Neetika] Bhabha Atom Res Ctr, Radioanalyt Chem Div, Mumbai 400085, Maharashtra, India; [Boda, Anil; Ali, Sk. Musharaf] Bhabha Atom Res Ctr, Chem Engn Div, Mumbai 400085, Maharashtra, India; [Kumar, Pranaw] Bhabha Atom Res Ctr, Fuel Chem Div, Mumbai 400085, Maharashtra, India published Reduction in Coordination Number of Eu(III) on Complexation with Pyrazine Mono- and Di-Carboxylates in Aqueous Medium in 2019, Cited 52. SDS of cas: 98-97-5. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

The denticity, flexibility, and steric hindrance of the ligand are key factors in deciding the mode and number of coordination around a metal ion on complex formation. The thermodynamic aspects of lanthanide complexation with various multidentate ligands provides a significant insight into understand the coordination chemistry of lanthanides in framing the relevant metal organic networks for the applications in biological, biochemical and medical aspects. The pyrazine carboxylic acids are known to form many structurally important complexes and further can form chelates with coordination number of eight for europium in which more water molecules can be knocked out from the primary coordination sphere than demanded by denticity of the ligand. The present studies aimed at ESI-MS characterization and determination of the thermodynamic parameters (log beta, Delta G, Delta H, and Delta S), luminescence properties of europium complexes with pyrazine-2-carboxylate and pyrazine-2,3-dicarboxylate in aqueous solutions by experiment as well as theory. Time resolved luminescence spectroscopy supported by DFT calculations are carried out to optimize the stable geometries of the complexes with various modes of binding and coordination. Furthermore, the thermodynamic parameters estimated theoretically have been used to trace the path of complex formation.

SDS of cas: 98-97-5. Welcome to talk about 98-97-5, If you have any questions, you can contact Dumpala, RMR; Boda, A; Kumar, P; Rawat, N; Ali, SM or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Category: Pyrazines. In 2019 OPT MATER published article about BIOLOGICAL EVALUATION; ORGANIC FRAMEWORKS; COMPLEXES; ANTICANCER; POLYMERS; DERIVATIVES; COPPER; DRUGS; PHOTOLUMINESCENCE; HETEROCYCLES in [Wang, Yong-Tao; Wu, Yu-Song; Tang, Gui-Mei] Qilu Univ Technol, Shandong Acad Sci, Dept Chem Engn, Jinan 250353, Shandong, Peoples R China in 2019, Cited 103. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

A set of new salts containing benzimidazole and pyrazine groups, namely, [HPZBI]X-+(-) nH(2)O (X = Cl (n = 1) (1), NO3 (n = 1) (2), ClO4 (n = 0) (3) and H2PO4 (n = 0) (4)) [PZBI = 2-(pyrazin-2-yl)-1H-benzimidazole], were obtained by the reaction of PZBI and a set of inorganic acid, respectively. The emission maxima can be found at 444, 472, 471, 432 and 443 nm for PZBI and its compounds 1-4 in the solid state at room temperature, respectively. Compared with the free PZBI, the emission maxima of compounds 1-4 are obviously blue/red-shifted for 1-4, indicating that the emission maxima are relative to the intermolecular packing distances. Their photoluminescent lifetime and quantum yield are 1.10 ns and 24.5% for 1, 0.99 ns and 26.4% for 2, 0.94 ns and 21.65% for 3, 2.86 ns and 20.57% for 4, respectively. Compounds 1-4 were structurally characterized by X-ray single crystal diffraction, FT-IR, and UV-Vis spectra. Single crystal X-ray diffraction reveals that pi center dot center dot center dot pi packing interactions and a set of hydrogen bonds can be observed. The shortest distances of pi center dot center dot center dot pi stacking interactions are 3.613, 3.534, 3.731 and 3.492 angstrom in compounds 1-4, respectively. Additionally, the thermal stabilities of compounds 1-4 were investigated in detail.

Welcome to talk about 98-97-5, If you have any questions, you can contact Wang, YT; Wu, YS; Tang, GM or send Email.. Category: Pyrazines

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Application In Synthesis of Pyrazine-2-carboxylic acid. In 2019 BIOORGAN MED CHEM published article about CARFILZOMIB; DESIGN in [Lei, Meng; Miao, Hang; Feng, Huayun] Nanjing Forestry Univ, Coll Sci, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China; [Zhang, Haoyang; Du, Xiao; Zhou, Hui; Wang, Xueyuan; Zhu, Yongqiang] Nanjing Normal Univ, Coll Life Sci, 1 Wenyuan Rd, Nanjing 210046, Jiangsu, Peoples R China; [Wang, Jia; Shi, Jingmiao; Liu, Zhaogang; Zhu, Yongqiang] Jiangsu Chia Tai Fenghai Pharmaceut Co Ltd, 9 Weidi Rd, Nanjing 210046, Jiangsu, Peoples R China; [Shen, Jian] Nanjing Normal Univ, Coll Chem & Mat Sci, 1 Wenyuan Rd, Nanjing 210046, Jiangsu, Peoples R China in 2019, Cited 21. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

A series of novel tetrapeptidyl epoxyketone inhibitors of 20S proteasome was designed and synthesized. To fully understand the SAR, various groups at R-1, R-2, R-3, R-4 and R-5 positions, including aromatic and aliphatic substituents were designed, synthesized and biologically assayed. Based on the enzymatic results, seven compounds were selected to evaluate their cellular activities and soluble compound 36 showed strong potency against human multiple myeloma (MM) cell lines. Microsomal stability results indicated that compound 36 was more stable in mice, rat and human microsomes than marketed carfilzomib. The in vivo activities of this compound were evaluated with the xenograft mice models of MM cell lines ARH77 and RPMI-8226 with luciferase expression and the T/C value of the two models were 49.5% and 37.6%, respectively. To evaluate the potential cardiovascular toxicity, inhibition of hERG ion channel in HEK293 cells by compound 36 and carfilzomib was carried out. The results indicated that 36 had no binding affinity for the hERG ion channel while carfilzomib could bind it with IC50, of 92.1 mu M.

Application In Synthesis of Pyrazine-2-carboxylic acid. Welcome to talk about 98-97-5, If you have any questions, you can contact Lei, M; Zhang, HY; Miao, H; Du, X; Zhou, H; Wang, J; Wang, XY; Feng, HY; Shi, JM; Liu, ZG; Shen, J; Zhu, YQ or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Product Details of 98-97-5. Authors Alsayed, SSR; Lun, SC; Payne, A; Bishai, WR; Gunosewoyo, H in WILEY published article about in [Alsayed, Shahinda S. R.; Gunosewoyo, Hendra] Curtin Univ, Fac Hlth Sci, Sch Pharm & Biomed Sci, Perth, WA, Australia; [Lun, Shichun; Bishai, William R.] Johns Hopkins Sch Med, Dept Med, Ctr TB Res, Div Infect Dis, Baltimore, MD 21205 USA; [Payne, Alan] Curtin Univ, Sch Mol & Life Sci, Perth, WA, Australia; [Bishai, William R.] Howard Hughes Med Inst, Chevy Chase, MD USA in 2021, Cited 54. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

Several rationally designed isoniazid (INH), pyrazinamide (PZA) and ciprofloxacin (CPF) derivatives were conveniently synthesized and evaluated in vitro against H37Rv Mycobacterium tuberculosis (M. tb) strain. CPF derivative 16 displayed a modest activity (MIC = 16 mu g/ml) and was docked into the M. tb DNA gyrase. Isoniazid-pyrazinoic acid (INH-POA) hybrid 21a showed the highest potency in our study (MIC = 2 mu g/ml). It also retained its high activity against the other tested M. tb drug-sensitive strain (DS) V4207 (MIC = 4 mu g/ml) and demonstrated negligible cytotoxicity against Vero cells (IC50 >= 64 mu g/ml). Four tested drug-resistant (DR) M. tb strains were refractory to 21a, similar to INH, whilst being sensitive to CPF. Compound 21a was also inactive against two non-tuberculous mycobacterial (NTM) strains, suggesting its selective activity against M. tb. The noteworthy activity of 21a against DS strains and its low cytotoxicity highlights its potential to treat DS M. tb.

Product Details of 98-97-5. Bye, fridends, I hope you can learn more about C5H4N2O2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Category: Pyrazines. In 2019 INORG CHEM published article about AEROBIC OXIDATION; COORDINATION POLYMER; SELECTIVE OXIDATION; FENTON DEGRADATION; CRYSTAL-STRUCTURE; WATER in [Li, Dandan; Xu, Qiaofei; Li, Yingguang; Qiu, Yueting; Ma, Pengtao; Niu, Jingyang; Wang, Jingping] Henan Univ, Coll Chem & Chem Engn, Inst Mol & Crystal Engn, Henan Key Lab Polyoxometalate Chem, Kaifeng 475004, Henan, Peoples R China in 2019, Cited 54. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

A novel copper-containing 3D polyoxometalate-based metal-organic framework (POMOF), H[(Cu5CuII)-Cu-I(pzc)(2)(pz)(4.5){P2W18O62}]center dot 6H(2)O (HENU-1, HENU = Henan University; Hpzc = pyrazine-2-carboxylic acid, pz = pyrazine), was successfully isolated by a one-step hydrothermal method. In this compound, the {P2W18} polyanion acts as a seven-connected linker bridging adjacent 2D double-layer networks, as well as a template to induce the formation of the desired 3D framework. Particularly, the pz ligands are generated from pzc ligands in situ during the reaction process. HENU-1 exhibits not only good stability in air but also tolerance to acidic and basic media. It was first employed as a highly efficient heterogeneous catalyst for the oxidation of 1-phenylethanol into acetophenone, which shows 97% yield using tert-butyl hydroperoxide as oxidant with a turnover frequency of up to 9690.h(-1), and was reused for at least five cycles without significant catalytic activity loss. No POM leaching or framework decomposition was observed in our study.

Category: Pyrazines. Welcome to talk about 98-97-5, If you have any questions, you can contact Li, DD; Xu, QF; Li, YG; Qiu, YT; Ma, PT; Niu, JY; Wang, JP or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Yang, ZF; Yang, XD; Jin, LY; Dong, KL; Ma, PT; Niu, JY; Wang, JP in [Yang, Zongfei; Yang, Xindi; Jin, Linyu; Dong, Kaili; Ma, Pengtao; Niu, Jingyang; Wang, Jingping] Henan Univ, Henan Key Lab Polyoxometalate Chem, Inst Mol & Crystal Engn, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China published Synthesis and characterization of an octanuclear nickel(II) polyoxometalate cluster in 2020, Cited 29. Application In Synthesis of Pyrazine-2-carboxylic acid. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

A high-nuclearity nickel-substituted polyoxotungstate, Na6K5.5H4.5{[Ni-8(OH)(6)(H2O)(2)](CO3)(3)(SiW9O34)(2)}center dot 22H(2)O (1), has been obtained by the reaction of Na-10[alpha-SiW9O34]center dot 18H(2)O, Ni(NO3)(2)center dot 6H(2)O and K(2)CO(3)in aqueous solution and characterized by IR spectroscopy, single crystal X-ray diffraction, thermal gravimetric analysis and elemental analysis. Carbonate is not only used to adjust the pH of the solution, but also is a structure-stabilizing agent. The polyoxoanion {[Ni-8(OH)(6)(H2O)(2)](CO3)(3)(SiW9O34)(2)}(16-)(1a) can be regarded as two {[Ni-4(OH)(3)(H2O)](SiW9O34)} subunits connected by three carbonate groups, which represents the first polyanion containing an octanuclear nickel cluster based on trivacant Keggin-type polyoxotungstate {XW9} (X = heteroatom). The subunit {[Ni-4(OH)(3)(H2O)](SiW9O34)} can be viewed as a tetranuclear nickel cluster linked to a trivacant Keggin-type polyoxotungstate {SiW9O34}. Furthermore, magnetic measurements show that1exhibits antiferromagnetic interactions.

Welcome to talk about 98-97-5, If you have any questions, you can contact Yang, ZF; Yang, XD; Jin, LY; Dong, KL; Ma, PT; Niu, JY; Wang, JP or send Email.. Application In Synthesis of Pyrazine-2-carboxylic acid

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Application In Synthesis of Pyrazine-2-carboxylic acid. Authors Swiderski, G; Kalinowska, M; Jablonska-Trypuc, A; Wolejko, E; Wydro, U; Lyszczek, R; Rusinek, I; Lewandowski, W in ELSEVIER published article about in [Swiderski, Grzegorz; Kalinowska, Monika; Jablonska-Trypuc, Agata; Wolejko, Elzbieta; Wydro, Urszula; Lewandowski, Wlodzimierz] Bialystok Tech Univ, Dept Chem Biol & Biotechnol, Wiejska 45E St, PL-15351 Bialystok, Poland; [Lyszczek, Renata; Rusinek, Iwona] UMCS, Dept Gen & Coordinat Chem, MC Sklodowska Sq 2, PL-20031 Lublin, Poland in 2021, Cited 50. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

Diazinecarboxylic acids (pyridazine-3-carboxylic, pyridazine-4-carboxylic, pyrimidine-2-carboxylic, pyrimidine-4-carboxylic, pyrimidine-5-carboxylic and pyrazine-2-carboxylic acids) were characterized by means of spectroscopic (FT-Raman, FTIR, UV, (HNMR)-H-1, (CNMR)-C-13) and thermogravimetric analysis as well as antimicrobial and cytotoxic tests. The structures of diazinecarboxylic acids were calculated by the DFT method (B3LYP/6-311G(d, p). For the most stable conformers, the energy of HOMO and LUMO molecular orbitals, the geometric (HOMA, GEO, EN, I6) and magnetic (NICS) aromaticity indices, NBO electronic charge distribution, sEDA and pEDA indexes, Wiberg Bond Order, Wiberg Index and theoretical IR and NMR spectra have been calculated. The energies of protonating and deprotonating acids were also calculated. The effect of the nitrogen heteroatom position in the aromatic ring in relation to the position of the carboxyl group on the electronic charge distribution, thermal stability, antimicrobial and cytotoxicity activities of the examined acids was determined. Antimicrobial activity of tested acids against of Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosaand Candida albicanswas calculated based on MTT colorimetric assay (MCA). The cytotocic effect of diazynecarboxylic acids was examined in A375 melanoma cell line and DLD-1 cell line. A biplot analysis was performed in order to determine the correlations between selected parameters of the tested compounds and relative cell viability of E. coli, B. subtilis, P. aeruginosa, C. albicans, A375 and DLD-1 cell lines. Thermal behaviour of all investigated carboxylic acids was investigated using thermogravimetry (TG) and differential scanning calorimetry (DSC) techniques in flowing air atmosphere. All compounds are stable in room temperature. (C) 2021 Elsevier B.V. All rights reserved.

Application In Synthesis of Pyrazine-2-carboxylic acid. Bye, fridends, I hope you can learn more about C5H4N2O2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

I found the field of Crystallography very interesting. Saw the article The crystal structures of the ligand N-(quinolin-8-yl) pyrazine-2-carboxamide and of a tetranuclear copper(II) complex published in 2019. Recommanded Product: Pyrazine-2-carboxylic acid, Reprint Addresses Stoeckli-Evans, H (corresponding author), Univ Neuchatel, Inst Phys, Rue Emile Argand 11, CH-2000 Neuchatel, Switzerland.. The CAS is 98-97-5. Through research, I have a further understanding and discovery of Pyrazine-2-carboxylic acid

The title tridentate ligand, C14H10N4O, N-(quinolin-8-yl) pyrazine-2-carboxamide (HL1), crystallizes with three independent molecules (A, B and C) in the asymmetric unit. All three molecules are relatively planar (r.m.s. deviations are 0.068, 0.055 and 0.06 angstrom, respectively), with the NH H atom forming three-centered (bifurcated) intramolecular N-H center dot center dot center dot N hydrogen bonds in each molecule. There is also an intramolecular C-H center dot center dot center dot O contact present in each molecule, involving the benzene ring of the quinoline unit and the amide carboxamide O atom. In the crystal, the three molecules stack in columns with the various molecules being linked by offset pi-pi interactions [intercentroid distances vary from 3.367 (5) to 3.589 (5) angstrom], forming layers parallel to the ab plane. The title complex, [Cu-4(C42H44N8O16)]center dot 2CH(3)OH, {hexa-mu-acetato-1: 2 kappa O-2:O’;2:3 kappa O-8:O’;3:4 kappa O-2:O’-dimethanol-1 kappa O, 2 kappa O-bis[N-(quinolin-8-yl) pyrazine-2-carboxamide]-1 kappa N-3, N’, N ”; 4 kappa(3) N, N’, N ”-tetracopper(II) methanol disolvate} (I), was obtained by the reaction of HL1 with Cu(CH3CO2)(2). It consists of a tetranuclear complex with a central tetrakis(mu-acetato) dicopper paddle-wheel moiety linked on either side via bridging acetato ions to a mononuclear copper(II)-(L1) complex; it crystallizes as a methanol disolvate. The complex possesses inversion symmetry, being located about a center of symmetry situated at the mid-point of the Cu center dot center dot center dot Cu bond of the paddle-wheel moiety. In the crystal, the complex molecules are linked by O-H center dot center dot center dot O hydrogen bonds, forming chains along the [01 (1) over bar] direction, which are linked by offset pi-pi interactions [intercentroid distance = 3.7367 (11) angstrom] and C-H center dot center dot center dot O hydrogen bonds, leading to the formation of a supramolecular framework.

Bye, fridends, I hope you can learn more about C5H4N2O2, If you have any questions, you can browse other blog as well. See you lster.. Recommanded Product: Pyrazine-2-carboxylic acid

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem