diethyl 2-(3-methyl-5-nitroimidazol-4-yl)propanedioate

3-乙酰基-7-二乙基氨基-2H-色烯-2-酮

diethyl 2-(3-hydroxy-4-oxonaphthalen-1-ylidene)propanedioate

2-hept-2-ynylpropanedioic acid

3-oxo-cyclopentane-1,2,4-tricarboxylic acid triethyl ester