| —— | (3S,4R)-3-<(1R)-(tert-butyldimethylsiloxy)ethyl>-4-<(2S)-N-p-nitrobenzyloxycarbonylpyrrolidin-2-yl>carbonylthioazetidin-2-one | 87596-64-3 | C24H35N3O7SSi | 537.709 | 
                                                                                                                                            
                                        | —— | methyl (3S,5R,6S)-6-<(1R)-(tert-butyldimethylsiloxy)ethyl>penicillanate | 81225-42-5 | C17H31NO4SSi | 373.589 | 
                                                                                                                                            
                                        | —— | methyl 6-α-bromo-6-β-<(1R)-hydroxyethyl>penicillanate | 80629-46-5 | C11H16BrNO4S | 338.222 | 
                                                                                                                                            
                                        | —— | methyl (3S,5R,6S)-6-<(R)-1-hydroxyethyl>penicillanate | 76581-81-2 | C11H17NO4S | 259.326 | 
                                                                                                                                            
                                        | —— | (3R,4R)-4-acetoxy-3-<(1R)-(tert-butyldimethylsiloxy)ethyl>-1-(1-methoxycarbonyl-2-methylpropen-1-yl)-azetidin-2-one | 78963-50-5 | C19H33NO6Si | 399.56 |