benzyl N-[(4S,5R)-4-benzyl-1,3-oxazolidin-2-one-5-carbonyl]piperidine-4-carboxylate

benzyl N-[(4S,5S)-4-benzyl-1,3-oxazolidin-2-one-5-carbonyl]piperidine-4-carboxylate

benzyl N-{(2S,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-4-phenylbutanoyl}piperidine-4-carboxylate

benzyl N-[(4S,5S)-4-benzyl-3-(3-phenylpropionyl)-1,3-oxazolidin-2-one-5-carbonyl]piperidine-4-carboxylate

(alphaS,betaS)-beta-[[(1,1-二甲基乙氧基)羰基]氨基]-alpha-羟基-苯丁酸