(organic chemistry) A diazine in which the two nitrogen atoms are in the para- positions; many of its derivatives are pharmaceuticals.

plural of pyrazine

Alternative form of pyrazine

plural of pyrazin

(organic chemistry, pharmacology) The amide of pyrazinoic acid; a bacteriostatic prodrug, pyrazine-2-carboxamide, used to treat tuberculosis.

(organic chemistry, especially in combination) The radical derived from pyrazine.

(organic chemistry) A heterocyclic amide derived from pyrazine

plural of pyrazinone

(organic chemistry, especially in combination) A pyrazinyl radical as a substituent

(organic chemistry) The carboxylic acid pyrazine-2-carboxylic acid derived from pyrazine