丁酸

tert-butyl 3-methyl-5-oxo-1H-pyrazole-2-carboxylate

5-methyl-4-nitro-1,2-dihydropyrazol-3-one

3,4-二甲基-1,6-二氢吡喃并[2,3-C]吡唑-6-酮

3-(5-methyl-3-oxo-2,3-dihydro-1H-pyrazol-4-yl)-crotonic acid ethyl ester