| —— | (5S,8R)-2,4-dioxo-1,3,7-triaza-spiro[4.4]nonane-7,8-dicarboxylic acid 7-benzyl ester 8-tert-butyl ester | 870097-45-3 | C19H23N3O6 | 389.408 | 
                                                                                                                                            
                                        | —— | Nα-Fmoc-Nβ-Boc pro4(2S4S) | 870097-32-8 | C27H30N2O8 | 510.544 | 
                                                                                                                                            
                                        | —— | (2R,4R)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methoxycarbonyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidine-2-carboxylic acid | 870097-34-0 | C27H30N2O8 | 510.544 | 
                                                                                                                                            
                                        | —— | (2R,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methoxycarbonyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidine-2-carboxylic acid | 900148-96-1 | C27H30N2O8 | 510.544 | 
                                                                                                                                            
                                        | —— | (2R,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-pyrrolidine-1,2,4-tricarboxylic acid 1-benzyl ester 2-tert-butyl ester 4-methyl ester | 900149-06-6 | C34H36N2O8 | 600.668 | 
                                                                                                                                            
                                        | —— | (2R,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-pyrrolidine-1,2,4-tricarboxylic acid 1-benzyl ester 2-tert-butyl ester | 900149-05-5 | C33H34N2O8 | 586.642 | 
                                                                                                                                            
                                        | —— | (3S,5R)-3-amino-1-((benzyloxy)carbonyl)-5-(tert-butoxycarbonyl)pyrrolidine-3-carboxylic acid | 900149-04-4 | C18H24N2O6 | 364.398 |