2-乙基硫代-5-甲基-3H-嘧啶-4-酮

2-硫乙基-4-氨基-5-氰基嘧啶

1-methyl-4-phenylimidazol-2-amine

N-(2-羟基乙基)胍

2-(3-hydroxypropyl)guanidine,nitric acid