919768-35-7

4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-6-[[(6R)-7-[(4-nitrophenyl)methoxy]-6-[[[(4-nitrophenyl)methoxy]carbonyl]amino]-1,7-dioxoheptyl]amino]-7-oxo-,(4-nitrophenyl)methyl ester, (2S,5R,6R)-