ethyl 4-(3,5-dimethylphenyl)sulfanyl-5-ethyl-6-methyl-2-oxo-1H-pyridine-3-carboxylate

ethyl 2-chloro-2-ethyl-3-oxobutanoate

ethyl 5-fluoro-3-methyl-1H-indole-2-carboxylate

5-甲氧基-3-甲基-1H-吲哚-2-羧酸乙酯

2-乙酰基-2-丁酸乙酯