N-(Ethoxycarbonyl)imidokohlensaeure-diethylester

3-phenyl-cyclopent-2-enone semicarbazone

3-乙氧基羰基-1-苯基戊烷-1,4-二酮

2-methyl-5-phenylfuran

5-bromo-2-methyl-6-oxo-4-phenyl-6H-pyran-3-carboxylic acid ethyl ester