| —— | 
                                        (1aS,2S,4aR,4bS,5S)-5-tert-butoxy-2-hydroxymethyl-4-oxo-pyrrolidino[1,2-b]isoxazolidino[4,5-c]tetrahydrofuran | 
                                        901120-04-5 | 
                                        C13H21NO5 | 
                                        271.313 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1aS,2R,4aR,4bS,5S)-5-tert-butoxy-2-formyl-4-oxo-pyrrolidino[1,2-b]isoxazolidino[4,5-c]tetrahydrofuran | 
                                        901120-03-4 | 
                                        C13H19NO5 | 
                                        269.298 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1aS,2S,4aR,4bS,5S)-5-tert-butoxy-2-tert-butyldiphenylsiloxymethyl-4-oxo-pyrrolidino[1,2-b]isoxazolidino[4,5-c]tetrahydrofuran | 
                                        901120-05-6 | 
                                        C29H39NO5Si | 
                                        509.718 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1aS,2S,6aS,6bS,7S)-7-tert-butoxy-4,4-dimethyl-3,5-dioxa-2-mesyloxymethylpyrrolidino[1,2-b]isoxazolidino[4,5]cycloheptane | 
                                        901120-09-0 | 
                                        C17H31NO7S | 
                                        393.502 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1aS,2S,6aS,6bS,7S)-2-(tert-butyldiphenylsiloxymethyl)-7-tert-butoxy-4,4-dimethyl-3,5-dioxa-pyrrolidino[1,2-b]isoxazolidino[4,5]cycloheptane | 
                                        901120-07-8 | 
                                        C32H47NO5Si | 
                                        553.814 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1aS,2S,3S,3aS,4S)-2-(2'-tert-butyldiphenylsiloxymethyl-1'-hydroxy)-4-tert-butoxy-3-hydroxymethyl-pyrrolidino[1,2-b]isoxazolidine | 
                                        901120-06-7 | 
                                        C29H43NO5Si | 
                                        513.75 |