ethyl 2-methyl-4-phenylpyridine-3-carboxylate

ethyl 2-(bromomethyl)pyridine-3-carboxylate

6-氯-2,4-二甲基烟酸乙酯

ethyl 1-(4-fluorophenyl)sulfonylpiperidine-4-carboxylate

ethyl-3-aminomethyl crotonate