丙炔酸乙酯

1-吡咯烷丙烯酸乙酯

2-Dimethylaminomethylen-acetessigsaeureethylester

5-氨基-3-甲基异恶唑-4-甲酸乙酯

3-methyl-5-[N'-(toluene-4-sulfonyl)-hydrazino]-isoxazole-4-carboxylic acid ethyl ester