4-benzyl-1-phenylpiperazin-2-one

2-(2-羟基乙基氨基)-n-苯乙酰胺

4-benzyloxycarbonyl-1-phenyl-2-piperazinone

3-oxo-4-phenylpiperazine-1-carbaldehyde

benzyl 2-(phenylamino)ethylcarbamate