(3R,4S)-1-benzoyl-3-triisopropylsilyloxy-4-phenylazetidin-2-one

(2R,3S)-N-叔丁氧羰基-3-苯基异丝氨酸甲酯

(2*,4S,5R)-methyl N-tert-butoxycarbonyl-2-(4'-methoxy)phenyl-4-phenyl-1,3-oxazolidine-5-methionate