| —— | 
                                        tert-butyl (1'R,2'R,4'S,5S,6'R,8'S,9'S,10'R)-9'-(4-methoxyphenyl)-10'-methyl-7'-oxospiro[4H-1,2-oxazole-5,3'-5-oxapentacyclo[7.5.2.01,10.02,8.04,6]hexadec-15-ene]-3-carboxylate | 
                                        294207-99-1 | 
                                        C30H35NO6 | 
                                        505.611 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        tert-butyl (1'R,2'R,4'S,5S,8'R,10'S,11'S,12'R)-6',11'-bis(4-methoxyphenyl)-12'-methyl-9'-oxospiro[4H-1,2-oxazole-5,3'-5,7-dioxapentacyclo[9.5.2.01,12.02,10.04,8]octadec-17-ene]-3-carboxylate | 
                                        294207-91-3 | 
                                        C38H43NO8 | 
                                        641.761 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        tert-butyl (1'S,5S,6'R)-4'-bromo-5'-oxospiro[4H-1,2-oxazole-5,2'-7-oxabicyclo[4.1.0]hept-3-ene]-3-carboxylate | 
                                        294208-37-0 | 
                                        C13H14BrNO5 | 
                                        344.162 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        tert-butyl (1'S,5S,6'R)-5'-oxospiro[4H-1,2-oxazole-5,2'-7-oxabicyclo[4.1.0]hept-3-ene]-3-carboxylate | 
                                        294208-01-8 | 
                                        C13H15NO5 | 
                                        265.266 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (5S,9R,10S)-9,10-Dihydroxy-8-oxo-1-oxa-2-aza-spiro[4.5]deca-2,6-diene-3-carboxylic acid tert-butyl ester | 
                                        294207-95-7 | 
                                        C13H17NO6 | 
                                        283.281 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1'S,5S,6'R)-4'-bromo-5'-oxospiro[4H-1,2-oxazole-5,2'-7-oxabicyclo[4.1.0]hept-3-ene]-3-carboxylic acid | 
                                        294208-18-7 | 
                                        C9H6BrNO5 | 
                                        288.054 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1'S,5S,6'R)-N-benzyl-4'-bromo-5'-oxospiro[4H-1,2-oxazole-5,2'-7-oxabicyclo[4.1.0]hept-3-ene]-3-carboxamide | 
                                        294208-20-1 | 
                                        C16H13BrN2O4 | 
                                        377.194 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1'S,5S,6'R)-5'-oxospiro[4H-1,2-oxazole-5,2'-7-oxabicyclo[4.1.0]hept-3-ene]-3-carboxylic acid | 
                                        294208-14-3 | 
                                        C9H7NO5 | 
                                        209.158 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (5S,9R,10S)-9,10-Dihydroxy-8-oxo-1-oxa-2-aza-spiro[4.5]deca-2,6-diene-3-carboxylic acid | 
                                        294207-97-9 | 
                                        C9H9NO6 | 
                                        227.174 |