81036-29-5
{(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-[4-(4-nitro-benzyloxycarbonylamino)-butylsulfanylthiocarbonylsulfanyl]-4-oxo-azetidin-1-yl}-hydroxy-acetic acid 4-nitro-benzyl ester
81036-38-6
(5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-[4-(4-nitro-benzyloxycarbonylamino)-butylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
81036-35-3
(5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-[4-(4-nitro-benzyloxycarbonylamino)-butylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
81036-44-4
(5R,6S)-6-((R)-1-Hydroxy-ethyl)-3-[3-(4-nitro-benzyloxycarbonylamino)-propylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester
81036-45-5
(5S,6S)-6-((R)-1-Hydroxy-ethyl)-3-[3-(4-nitro-benzyloxycarbonylamino)-propylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester