Any of a group of organic compounds resulting from the condensation reaction of hydrazine and two carbonyl groups.
A six-membered heterocyclic compound, such as pyridine, that contains one or more atoms of nitrogen with a ring structure resembling that of benzene.
Any of a group of organic chemical compounds with a 6-membered ring containing one or more nitrogen atoms: the group consists of the diazines, triazines, etc.
Any of various organic compounds, such as pyridine or pyrimidine, that have a ring structure like that of benzene but with one or more carbon atoms replaced by a nitrogen atom. Azines are heterocyclic compounds.