| —— | 6'-hydroxy-7'-methoxy-2'-methyl-3',4'-dihydro-6H,2'H-spiro[indeno[4,5-d][1,3]dioxole-7,1'-isoquinolin]-8-one | 32870-26-1 | C20H19NO5 | 353.375 | 
                                                                                                                                            
                                        | —— | 5-methoxy-8-methyl-1,6,7,8-tetrahydro-6'H-spiro[[1,3]dioxino[5,4-f]isoquinoline-7,7'-indeno[4,5-d][1,3]dioxol]-8'-one | 32420-42-1 | C22H21NO6 | 395.412 | 
                                                                                                                                            
                                        | —— | 7'-methoxy-2'-methyl-6,8,3',4'-tetrahydro-2'H-(7rN)-spiro[indeno[4,5-d][1,3]dioxole-7,1'-isoquinoline]-8t,6'-diol | 32420-43-2 | C20H21NO5 | 355.39 | 
                                                                                                                                            
                                        | —— | (+/-)-fumaricine | 24181-77-9 | C21H23NO5 | 369.417 | 
                                                                                                                                            
                                        | —— | 6'-methoxy-2'-methyl-6,8,3',4'-tetrahydro-2'H-(7rN)-spiro[indeno[4,5-d][1,3]dioxole-7,1'-isoquinoline]-8t,7'-diol | 24181-78-0 | C20H21NO5 | 355.39 |