| —— | (4aS,9aR)-8,8-Dimethyl-1-methylene-2,7-dioxo-1,2,4,4a,6a,7,8,9-octahydro-pentaleno[1,6a-c]pyran-5-carboxylic acid methyl ester | 112247-41-3 | C16H18O5 | 290.316 | 
                                                                                                                                            
                                        | —— | rac-methyl (4aR,6aS,9aS)-8,8-dimethyl-2-oxo-1,2,4a,6a,8,9-hexahydro-4H-spiro[pentaleno[1,6a-c]pyran-7,2'-[1,3]dioxolane]-5-carboxylate | 112247-39-9 | C17H22O6 | 322.358 | 
                                                                                                                                            
                                        | —— | rac-methyl (4aR,6aS,9aS)-8,8-dimethyl-1-methylene-2-oxo-1,2,4a,6a,8,9-hexahydro-4H-spiro[pentaleno[1,6a-c]pyran-7,2'-[1,3]dioxolane]-5-carboxylate | 112247-40-2 | C18H22O6 | 334.369 |