| —— | 10-(2-Hydroxy-phenyl)-7-oxo-7a,8,9,10-tetrahydro-7H-benzo[c]xanthene-8,9-dicarboxylic acid dimethyl ester | 135978-90-4 | C27H22O7 | 458.467 | 
                                                                                                                                            
                                        | —— | 8-(Hydroxy-diphenyl-methyl)-10-(2-hydroxy-phenyl)-7-oxo-7a,8,9,10-tetrahydro-7H-benzo[c]xanthene-9-carboxylic acid | 135978-85-7 | C37H28O6 | 568.626 | 
                                                                                                                                            
                                        | —— | 5-(2-Hydroxy-phenyl)-2,3,4a,5,14a,14b-hexahydro-7-oxa-2,3-diaza-dibenzo[a,h]anthracene-1,4,14-trione | 135978-75-5 | C25H18N2O5 | 426.428 | 
                                                                                                                                            
                                        | —— | 4-(2-Hydroxy-phenyl)-2-p-tolyl-3a,4,13a,13b-tetrahydro-6-oxa-2-aza-benzo[a]cyclopenta[h]anthracene-1,3,13-trione | 135978-81-3 | C32H23NO5 | 501.538 | 
                                                                                                                                            
                                        | —— | 2-(4-Chloro-phenyl)-4-(2-hydroxy-phenyl)-3a,4,13a,13b-tetrahydro-6-oxa-2-aza-benzo[a]cyclopenta[h]anthracene-1,3,13-trione | 135978-80-2 | C31H20ClNO5 | 521.956 | 
                                                                                                                                            
                                        | —— | 4-(2-Hydroxy-phenyl)-2-(4-methoxy-phenyl)-3a,4,13a,13b-tetrahydro-6-oxa-2-aza-benzo[a]cyclopenta[h]anthracene-1,3,13-trione | 135978-82-4 | C32H23NO6 | 517.538 |