2,4,6-trimethyl-1,4-dihydropyridine-3,5-dicarbonitrile
5,7-dimethyl-2,3,4,7-tetrahydro[1,4]thiazepine-6-carbonitrile
5,7-dimethyl-3,7,8,8a-tetrahydro-2H-thiazolo[3,2-a]pyridine-6-carbonitrile
5,7,8a-trimethyl-3,7,8,8a-tetrahydro-2H-thiazolo[3,2-a]pyridine-6,8-dicarbonitrile