2-氨基-5-甲基-1,3,4-噻二唑

ethyl N-(methylcarbamoyl)ethanimidate

2-methyl-5-oxo-1,4-dihydroimidazole-4-carboxamide

2-甲基-1,3-二氮杂螺[4.4]壬-1-烯-4-酮

ethyl N-phenylethanehydrazonate