| —— | (4R,5S)-3-benzyl 4-methyl 5-((R)-1-(tert-butoxycarbonyl)-2-(methoxycarbonyl)-5-oxopyrrolidin-2-yl)-2,2-dimethyloxazolidine-3,4-dicarboxylate | 866331-60-4 | C26H34N2O10 | 534.563 | 
                                                                                                                                            
                                        | —— | 3-O-benzyl 4-O-methyl (4R,5S)-5-[(2R)-5-acetyloxy-2-methoxycarbonyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidin-2-yl]-2,2-dimethyl-1,3-oxazolidine-3,4-dicarboxylate | 866331-61-5 | C28H38N2O11 | 578.617 | 
                                                                                                                                            
                                        | —— | (4R,5S)-5-((R)-2-Methoxycarbonyl-5-oxo-pyrrolidin-2-yl)-2,2-dimethyl-oxazolidine-3,4-dicarboxylic acid 3-benzyl ester 4-methyl ester | 866331-59-1 | C21H26N2O8 | 434.446 | 
                                                                                                                                            
                                        | —— | methyl (1S,7aR)-1-[(1R)-2-methoxy-2-oxo-1-(phenylmethoxycarbonylamino)ethyl]-3,3-dimethyl-5-oxo-6,7-dihydro-1H-pyrrolo[1,2-c][1,3]oxazole-7a-carboxylate | 866331-58-0 | C21H26N2O8 | 434.446 | 
                                                                                                                                            
                                        | —— | (1S,7aR)-methyl 1-((1R)-(methoxycarbonyl)azidomethyl)hexahydro-3,3-dimethyl-5-oxopyrrolo[1,2-c]oxazole-7a-carboxylate | 866331-70-6 | C13H18N4O6 | 326.309 | 
                                                                                                                                            
                                        | —— | (2R)-1-tert-butyl 2-methyl 2-((4R,5S)-5-(methoxycarbonyl)-2-thioxo-1,3-dioxolan-4-yl)-5-oxopyrrolidine-1,2-dicarboxylate | 866331-54-6 | C16H21NO9S | 403.41 | 
                                                                                                                                            
                                        | —— | (2R)-1-tert-butyl 2-methyl 2-((1R,2S)-2-(methoxycarbonyl)-1,2-dihydroxyethyl)-5-oxopyrrolidine-1,2-dicarboxylate | 866331-53-5 | C15H23NO9 | 361.349 | 
                                                                                                                                            
                                        | —— | methyl (2R)-2-[(4R,5S)-5-methoxycarbonyl-2-sulfanylidene-1,3-dioxolan-4-yl]-5-oxopyrrolidine-2-carboxylate | 866331-55-7 | C11H13NO7S | 303.293 | 
                                                                                                                                            
                                        | —— | (2R)-methyl 2-((1S,2R)-2-(methoxycarbonyl)-2-azido-1-hydroxyethyl)-5-oxopyrrolidine-2-carboxylate | 866331-56-8 | C10H14N4O6 | 286.244 | 
                                                                                                                                            
                                        | —— | (2R)-1-tert-butyl 2-methyl 2-(tert-butyldimethylsilyloxymethyl)-5-oxopyrrolidine-1,2-dicarboxylate | 866331-51-3 | C18H33NO6Si | 387.549 |