(2S,3S,3''S)-N-[3-(3-Acetoxy-3-methoxycarbonylpropanamido)-3-tert-butoxythiocarbonylpropanoyl]azetidine-2-thiocarboxylic Acid tert-Butyl Ester
(2S,3S,3''S)-N-[3-(3-Acetoxy-3-methoxycarbonylpropanamido)-3-tert-butoxythiocarbonylpropanoyl]azetidine-2-thiocarboxylic Acid tert-Butyl Ester;(αS,2S)-α-[[(3S)-3-(Acetyloxy)-4-Methoxy-4-oxo-1-thioxobutyl]aMino]-2-[(1,1-diMethylethoxy)carbonyl]-γ-thioxo-1