pyrazine Definition

diazine, benzene ring, thionaphthene, phenanthridine, pyrazole, piperidine, thioxene, benzanthracene, quinoxaline, thiazole, lutidine, tetracene, pyrrole, pyrrolidine, heterocycle, pyrroline, oxazole, quinazoline, picoline, pyridine, anilide, fluorene, functional group, carbazole, dinaphthyl, pyran, single bond, oxoacid, isoalloxazine, oxyquinoline, aldoxime, carbanil, cyclopentadiene, thienone, quinazol, thiophene, ureide, tetrazole, hydrocarbostyril, diazonium salt, molecular formula, xylidine, furoin, rubidine, imesatin, tetrazine, phenylthiourea, naphthylamine, phloramine, phthalein, acetamide, phenyl, carbostyril, glyoxime, hydroxylamine, chloranil, thiophthene, xylamide, croconate, ketoxime, gallein, imidazole, addition reaction, oxanilide, naphthyl, triple bond, sulphamide, isocyanic acid, benzene, benzal, acetophenone, grignard reagent, rufol, phenetol, oxymethylene, hydramine, heptine, pteridine, pyrimidine, heterocyclic compound, lepidine, substituent, nonylene, dodecanoic acid, sulfonyl, thiotolene, carbimide, dipyridil, ozonide, phenanthroline, tartramide, lactim, carbocyclic, imide, methene, oxytoluene, triazine, aminobenzoic acid, menthene, acyl halide,