ethyl 4-oxocyclohex-2-enecarboxylate

ethyl 4-oxocyclohexene-1-carboxylate

1-叔丁基-1H -吡唑- 3 -羧酸乙酯

乙基3-(2-甲氧基苯基)-2-丙炔酸酯

3-(4-methylphenyl)-2-phenylpyrimidin-4-one