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(2007/10/03)isopropyl (S)-2-(2-acetyl-1-benzyloxycarbonylhydrazino)-5-(methanesulfonyloxy)pentanoate
isopropyl (S)-2-(benzyloxycarbonylamino)-5-(methanesulfonyloxy)pentanoate
N-benzyloxycarbonyl-L-pyroglutamic acid isopropyl ester
isopropyl (S)-2-(benzyloxycarbonylamino)-5-hydroxypentanoate
(S)-N-Benzyloxycarbonylpyroglutamic acid chloride