| —— | Isobutyric acid (3R,3aR,4R,6R,6aR,9R,9aR,9bR)-6-hydroxy-3,6,9-trimethyl-2,8-dioxo-dodecahydro-azuleno[4,5-b]furan-4-yl ester | 118304-50-0 | C19H28O6 | 352.428 | 
                                                                                                                                            
                                        | —— | Isobutyric acid (3S,3aR,4R,6R,9R,9aS,9bR)-6-hydroxy-3,6,9-trimethyl-2,8-dioxo-2,3,3a,4,5,6,8,9,9a,9b-decahydro-azuleno[4,5-b]furan-4-yl ester | 118304-18-0 | C19H26O6 | 350.412 | 
                                                                                                                                            
                                        | —— | Isobutyric acid (3S,3aR,4R,6R,6aR,9bS)-6-hydroxy-3,6,9-trimethyl-2,8-dioxo-2,3,3a,4,5,6,6a,7,8,9b-decahydro-azuleno[4,5-b]furan-4-yl ester | 110188-57-3 | C19H26O6 | 350.412 |