I found the field of Chemistry very interesting. Saw the article Total Synthesis of Echinomycin and Its Analogues published in 2020. COA of Formula: C5H4N2O2, Reprint Addresses Ichikawa, S (corresponding author), Hokkaido Univ, Global Inst Collaborat Res & Educ GI CoRE, Fac Pharmaceut Sci, Ctr Res & Educ Drug Discovery, Sapporo, Hokkaido 0600812, Japan.; Ichikawa, S (corresponding author), Hokkaido Univ, Global Inst Collaborat Res & Educ GI CoRE, Global Stn Biostofaces & Drug Discovery, Sapporo, Hokkaido 0600812, Japan.. The CAS is 98-97-5. Through research, I have a further understanding and discovery of Pyrazine-2-carboxylic acid
The first total synthesis of echinomycin (1) was accomplished by featuring the late-stage construction of the thioacetal moiety via Pummerer rearrangement and simultaneous cyclization, as well as two-directional elongation of the peptide chains to construct a C2-symmetrical bicyclic octadecadepsipeptide bridged with a sulfide linkage. This strategy can be applicable to a variety of echinomycin analogues.
Welcome to talk about 98-97-5, If you have any questions, you can contact Kojima, K; Yakushiji, F; Katsuyama, A; Ichikawa, S or send Email.. COA of Formula: C5H4N2O2
Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem