1-苯基-5-丙基-吡唑-4-羰酰氯

ethyl 1-methyl-3-propylpyrazole-4-carboxylate

2-甲基-3-氧代己酸乙酯

1-甲基-5-丙基-1H-吡唑-4-甲酰氯

ethyl 2-fluoro-3-oxohexanoate