对苯二磺酸氨基丙二酰丁氰

(二氰基亚甲基氨基) 4-甲基苯磺酸酯

3,3-diamino-N'-hydroxy-2-(hydroxyamino)-N-oxoprop-2-enimidamide

2-phenyl-7H-purin-6-amine

2-pyridin-3-yl-7H-purin-6-amine