| —— | 
                                        dimethyl (1R,4bR,7S,9aS,10S,10aS)-7-hydroxy-1-methyl-8-methylene-3-oxo-2,3,4b,5,6,7,8,9,10,10a-decahydro-1H-7,9a-methanobenzo[a]azulene-1,10-dicarboxylate | 
                                        99221-44-0 | 
                                        C21H26O6 | 
                                        374.434 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        dimethyl (1R,7S,9aR,10S,10aS)-4b,7-dihydroxy-1-methyl-8-methylene-3-oxo-2,3,4b,5,6,7,8,9,10,10a-decahydro-1H-7,9a-methanobenzo[a]azulene-1,10-dicarboxylate | 
                                        78791-78-3 | 
                                        C21H26O7 | 
                                        390.433 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        methyl (1S,4R,8S,10aR,11S,11aS)-8-hydroxy-1-methyl-9-methylene-2-oxo-1,2,5,6,7,8,9,10,11,11a-decahydro-4H-1,4:8,10a-dimethanoazuleno[1,2-d]oxepine-11-carboxylate | 
                                        78791-81-8 | 
                                        C20H24O5 | 
                                        344.408 |