Yang, Pipeng et al. published their research in Journal of Chemical Research, Synopses in 1996 | CAS: 322-46-3

Pyrido[2,3-b]pyrazine (cas: 322-46-3) belongs to pyrazine derivatives. Pyrazines are part of several biologically active polycyclic compounds; examples are quinoxalines, phenazines; and the bio-luminescent natural products pteridines, flavins, and their derivatives. Pyrazine-based skeletons were incorporated into agents targeting a range of ailments. Many derivatives were synthesized and evaluated as potential cancer treatments.Recommanded Product: Pyrido[2,3-b]pyrazine

Quantitative resonance theory: heat of formation, bond order and charge density of azabenzenoid aromatic compounds was written by Yang, Pipeng;Hao, Wu. And the article was included in Journal of Chemical Research, Synopses in 1996.Recommanded Product: Pyrido[2,3-b]pyrazine This article mentions the following:

A quant. resonance theory approach (QRT) is shown to rationalize many exptl. results of azabenzenoid compounds; the group additivity method with a QRT resonance energy term gives ΔHf which correlates well with exptl. and AM1 data as in the case of benzenoid hydrocarbons. In the experiment, the researchers used many compounds, for example, Pyrido[2,3-b]pyrazine (cas: 322-46-3Recommanded Product: Pyrido[2,3-b]pyrazine).

Pyrido[2,3-b]pyrazine (cas: 322-46-3) belongs to pyrazine derivatives. Pyrazines are part of several biologically active polycyclic compounds; examples are quinoxalines, phenazines; and the bio-luminescent natural products pteridines, flavins, and their derivatives. Pyrazine-based skeletons were incorporated into agents targeting a range of ailments. Many derivatives were synthesized and evaluated as potential cancer treatments.Recommanded Product: Pyrido[2,3-b]pyrazine

Referemce:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem