8,9-二甲基-2,5,7,10-四氮杂双环[4.4.0]癸-1,3,5,7,9-五烯

6,7-dimethylpteridine

5-氰基-3,4-二甲基噻吩-2-羧胺

2,3-dimethylpyrido[2,3-b]pyrazine

(3-oxobutan-2-ylideneamino)thiourea