环戊酮

2-hydroxy-2-phenylpropionitrile

2-苯甲酰基乙酰乙酸乙酯

2-(3-oxo-3H-isobenzofuran-1-ylidene)-1-phenyl-butane-1,3-dione

2-benzoyl-3-methylamino-crotonic acid ethyl ester