| —— | 1(R),5(S)-8-tert-butoxycarbonyl-3-(2,4-dimethoxybenzyl)-3,8-diaza-2-oxobicyclo[3.2.1]octane | 335160-73-1 | C20H28N2O5 | 376.453 | 
                                                                                                                                            
                                        | —— | tert-butyl (2S,6S)-2-benzyl-4-[(2,4-dimethoxyphenyl)methyl]-3-oxo-6-prop-2-enylpiperazine-1-carboxylate | 335160-75-3 | C28H36N2O5 | 480.604 | 
                                                                                                                                            
                                        | —— | 5(S),3(S)-3-benzyl-4-tert-butoxycarbonyl-1-(2,4-dimethoxybenzyl)-5-[2-(phenylsulfonyloxy)ethyl]-2-piperazinone | 335160-81-1 | C33H40N2O8S | 624.755 | 
                                                                                                                                            
                                        | —— | 1(S),5(S)-1-benzyl-8-tert-butoxycarbonyl-3-(2,4-dimethoxybenzyl)-3,8-diaza-2-oxobicyclo[3.2.1]octane | 335160-83-3 | C27H34N2O5 | 466.577 | 
                                                                                                                                            
                                        | —— | 1(R),5(S)-8-[1-(4-cyano-3-fluorobenzyl)-5-imidazolylmethyl]-3-(2,4-dimethoxybenzyl)-3,8-diaza-2-oxobicyclo[3.2.1]octane | 335160-93-5 | C27H28FN5O3 | 489.549 |