| —— | (3S,4R)-3-<(R)-1-hydroxyethyl>-4-<2-oxo-3-(1-(((((p-nitrobenzyl)oxy)carbonyl)oxy)methyl)tetrazol-5-yl)propyl>azetidin-2-one | 88669-85-6 | C18H20N6O8 | 448.392 | 
                                                                                                                                            
                                        | —— | (3S,4R)-3-<(R)-1-hydroxyethyl>-4-<2-oxo-3-diazo-(1-(((((p-nitrobenzyl)oxy)carbonyl)oxy)methyl)tetrazol-5-yl)propyl>azetidin-2-one | 88669-87-8 | C18H18N8O8 | 474.39 | 
                                                                                                                                            
                                        | —— | (5R,6S)-3,7-dioxo-6-<(R)-1-hydroxyethyl>-2-(1-(((((p-nitrobenzyl)oxy)carbonyl)oxy)methyl)tetrazol-5-yl)-1-azabicyclo<3.2.0>heptane | 88669-90-3 | C18H18N6O8 | 446.376 | 
                                                                                                                                            
                                        | —— | (5R,6S)-2-((cyanomethyl)thio)-6-<(R)-1-hydroxyethyl>-2-(1-((((p-nitrobenzyl)oxy)carbonyl)methyl)tetrazol-5-yl)-1-azabicyclo<3.2.0>hept-2-en-7-one | 88670-07-9 | C20H19N7O7S | 501.48 | 
                                                                                                                                            
                                        | —— | Carbonic acid 5-{(5R,6S)-6-((R)-1-hydroxy-ethyl)-3-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanyl]-7-oxo-1-aza-bicyclo[3.2.0]hept-2-en-2-yl}-tetrazol-1-ylmethyl ester 4-nitro-benzyl ester | 88685-62-5 | C28H28N8O11S | 684.643 | 
                                                                                                                                            
                                        | —— | Carbonic acid 5-[(5R,6S)-3-(N,N-dimethyl-carbamimidoylmethylsulfanyl)-6-((R)-1-hydroxy-ethyl)-7-oxo-1-aza-bicyclo[3.2.0]hept-2-en-2-yl]-tetrazol-1-ylmethyl ester 4-nitro-benzyl ester | 88670-08-0 | C22H26N8O7S | 546.564 | 
                                                                                                                                            
                                        | —— | Carbonic acid 5-[(5R,6S)-6-((R)-1-hydroxy-ethyl)-7-oxo-3-phenylsulfanyl-1-aza-bicyclo[3.2.0]hept-2-en-2-yl]-tetrazol-1-ylmethyl ester 4-nitro-benzyl ester | 88669-95-8 | C24H22N6O7S | 538.541 | 
                                                                                                                                            
                                        | —— | Trifluoro-methanesulfonic acid (5R,6S)-6-((R)-1-hydroxy-ethyl)-2-[1-(4-nitro-benzyloxycarbonyloxymethyl)-1H-tetrazol-5-yl]-7-oxo-1-aza-bicyclo[3.2.0]hept-2-en-3-yl ester | 88670-02-4 | C19H17F3N6O10S | 578.439 |