| —— | (2S,5R,6R)-6-Carbamoyl-6-{2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 107721-46-0 | C31H34N6O8S | 650.712 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-Acetyl-6-{2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 94612-19-8 | C32H35N5O8S | 649.725 | 
                                                                                                                                            
                                        | —— | 6α-(methoxycarbonyl)penicillinate | 107685-96-1 | C32H35N5O9S | 665.724 | 
                                                                                                                                            
                                        | —— | (2S,5R,6S)-6-{2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2,6-dicarboxylic acid 6-allyl ester 2-benzyl ester | 107668-63-3 | C34H37N5O9S | 691.762 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-{2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-6-((E)-3-oxo-propenyl)-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 94612-17-6 | C33H35N5O8S | 661.736 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-((E)-2-Cyano-vinyl)-6-{2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 94612-16-5 | C33H34N6O7S | 658.735 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-{2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-6-(hydroxy-methoxy-methyl)-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 107668-62-2 | C32H37N5O9S | 667.74 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-{2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-6-(2-trimethylsilanyl-acetyl)-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 94612-20-1 | C35H43N5O8SSi | 721.907 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-Dimethoxymethyl-6-{2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 94612-21-2 | C33H39N5O9S | 681.767 | 
                                                                                                                                            
                                        | —— | (2S,5R,6R)-6-{2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-phenyl-acetylamino}-6-((E)-2-methoxycarbonyl-vinyl)-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester | 94612-18-7 | C34H37N5O9S | 691.762 |