N-[2,3,5,6-tetrafluoro-4-(N'-piperidino)phenyl]-N-methylthiomethyl-carbamic acid allyl ester

N-pentafluorophenyl-N-(1-naphthylmethylthio)methyl-carbamic acid allyl ester

Nα-tert-butoxycarbonyl-S-[N-(pentafluorophenyl)-N-(allyloxycarbonyl)aminomethyl]cysteine methyl ester

Nα-9-fluorenylmethoxycarbonyl-S-[N-[2,3,5,6-tetrafluoro-4-(N'-piperidino)phenyl]-N-(allyloxycarbonyl)aminomethyl]cysteine methyl ester

Nα-9-fluorenylmethoxycarbonyl-S-[N-[2,3,5,6-tetrafluoro-4-(N'-piperidino)phenyl]-N-(allyloxycarbonyl)aminomethyl]cysteine