(S)-Hydroxy-{(4R,5R)-5-[(S)-methoxycarbonyl-(9-phenyl-9H-fluoren-9-ylamino)-methyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-acetic acid

(S)-[(4R,5S)-5-((S)-Methoxycarbonyl-trifluoromethanesulfonyloxy-methyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-(9-phenyl-9H-fluoren-9-ylamino)-acetic acid methyl ester

(1R,2S,4S)-1-<(9-Phenyl-9-fluorenyl)amino>-2-<(tert-butyldimethylsilyl)oxy>-4-(methoxycarbonyl)cyclopentane