| —— | 
                                        8,12-Dioxa-1,20,21,22-tetrazatetracyclo[17.2.1.02,7.013,18]docosa-2,4,6,13,15,17,19(22),20-octaene | 
                                        1262442-59-0 | 
                                        C16H14N4O2 | 
                                        294.313 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        8,13-Dioxa-1,21,22,23-tetrazatetracyclo[18.2.1.02,7.014,19]tricosa-2,4,6,14,16,18,20(23),21-octaene | 
                                        1262442-60-3 | 
                                        C17H16N4O2 | 
                                        308.34 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (Z)-22H-4,10-dioxa-2(2,5)-tetrazola-1,3(1,2)-dibenzenacyclodecaphane | 
                                        1262442-61-4 | 
                                        C18H18N4O2 | 
                                        322.367 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (Z)-22H-4,11-dioxa-2(2,5)-tetrazola-1,3(1,2)-dibenzenacycloundecaphane | 
                                        1262442-62-5 | 
                                        C19H20N4O2 | 
                                        336.393 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        8,17-Dioxa-1,25,26,27-tetrazapentacyclo[22.2.1.02,7.010,15.018,23]heptacosa-2,4,6,10,12,14,18,20,22,24(27),25-undecaene | 
                                        1262442-63-6 | 
                                        C21H16N4O2 | 
                                        356.384 |