| —— | 
                                        (3S,4R,5R)-5-hydroxymethyl-4-(1H-indol-3-yl)-2-oxopyrrolidine-3-carboxylic acid methyl ester | 
                                        505086-82-8 | 
                                        C15H16N2O4 | 
                                        288.303 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (3R,4R,5R)-5-tert-butoxycarbonylamino-4-(1H-indol-3-yl)-2-oxotetrahydropyran-3-carboxylic acid methyl ester | 
                                        505086-76-0 | 
                                        C20H24N2O6 | 
                                        388.42 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (R,R)-4-[(2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-yl)-(1H-indol-3-yl)methyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylic acid tert-butyl ester | 
                                        505086-78-2 | 
                                        C25H32N2O7 | 
                                        472.538 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (R,R)-4-[(2,2-dimethyl-4,6-dioxo[1,3]dioxan-5-yl)(1H-indol-3-yl)methyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylic acid benzyl ester | 
                                        505086-79-3 | 
                                        C28H30N2O7 | 
                                        506.555 |