| —— | 
                                        (3aS)-2t-chloromethyl-3c-(toluene-4-sulfonyloxy)-(3ar,9ac)-2,3,3a,9a-tetrahydro-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-6-one | 
                                        56615-04-4 | 
                                        C16H15ClN2O6S | 
                                        398.824 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (3aS)-2t-benzoyloxymethyl-3c-(toluene-4-sulfonyloxy)-(3ar,9ac)-2,3,3a,9a-tetrahydro-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-6-one | 
                                        56615-02-2 | 
                                        C23H20N2O8S | 
                                        484.486 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (2S)-11syn-acetoxy-3t-benzoyloxymethyl-2,3-dihydro-1H-2r,5c-methano-pyrimido[1,2-c][1,3,5]oxadiazepin-9-one | 
                                        56615-11-3 | 
                                        C18H17N3O6 | 
                                        371.349 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (2R)-3t-benzoyloxymethyl-11syn-hydroxy-2,3-dihydro-1H-2r,5c-methano-pyrimido[1,2-c][1,3,5]oxadiazepin-9-one | 
                                        56615-05-5 | 
                                        C16H15N3O5 | 
                                        329.312 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (2R)-3t-benzoyloxymethyl-11syn-hydroxy-2,3-dihydro-1H-2r,5c-methano-pyrimido[1,2-c][1,3,5]oxadiazepine-9-thione | 
                                        56615-12-4 | 
                                        C16H15N3O4S | 
                                        345.379 |