| —— | 5,9,9,14-Tetramethyl-8-oxa-11,13,17,18-tetrazatetracyclo[8.8.0.02,7.012,17]octadeca-1(18),2(7),3,5,10,12,14-heptaen-16-one | 133210-74-9 | C17H16N4O2 | 308.34 | 
                                                                                                                                            
                                        | —— | 2,6,6,9-Tetramethyl-6H-5-oxa-7,8,11a,12-tetraaza-benzo[a]anthracen-11-one | 133210-59-0 | C17H16N4O2 | 308.34 | 
                                                                                                                                            
                                        | —— | 17,21,21-Trimethyl-20-oxa-2,4,11,12-tetrazapentacyclo[11.8.0.03,11.05,9.014,19]henicosa-1,3,5(9),12,14(19),15,17-heptaen-10-one | 133210-77-2 | C19H18N4O2 | 334.378 | 
                                                                                                                                            
                                        | —— | 7,11,11-Trimethyl-10-oxa-1,2,13,15-tetrazapentacyclo[12.8.0.03,12.04,9.016,21]docosa-2,4(9),5,7,12,14,16(21)-heptaen-22-one | 133210-80-7 | C20H20N4O2 | 348.404 | 
                                                                                                                                            
                                        | —— | 2,6,6-Trimethyl-10,11-dihydro-6H,9H-5-oxa-7,8,12a,13-tetraaza-benzo[a]cyclopenta[i]anthracen-12-one | 133210-76-1 | C19H18N4O2 | 334.378 | 
                                                                                                                                            
                                        | —— | 2,6,6-Trimethyl-9,10,11,12-tetrahydro-6H-5-oxa-7,8,13a,14-tetraaza-benzo[a]naphthacen-13-one | 133210-79-4 | C20H20N4O2 | 348.404 |