| 1 | 275-00-3 | Imidazo[1,2-b][1,2,4]triazine | C5H4N4 | 120.11 | | |
| 2 | 275-01-4 | 1,2,4-Triazolo[4,3-b][1,2,4]triazine (9CI) | C4H3N5 | 121.1 | | |
| 3 | 275-02-5 | 1,2,4-Triazolo[1,5-a]Pyrimidine | C5H4N4 | 120.11 | | |
| 4 | 275-03-6 | Tetrazolo[1,5-a]pyrimidine | C4H3N5 | 121.10012 | | |
| 5 | 275-51-4 | Azulene | C10H8 | 128.17 | 98-100°C(lit.) | |
| 6 | 275-54-7 | Cyclopent[c]azepine | C9H7N | 129.16 | | |
| 7 | 275-57-0 | 1H-Cyclohepta[c]furan (8CI,9CI) | C9H8O | 132.16 | | |
| 8 | 275-58-1 | Furo[3,4-d]oxepin (8CI,9CI) | C8H6O2 | 134.13 | | |
| 9 | 275-61-6 | Cyclopent[b]azepine | C9H7N | 129.16 | | |
| 10 | 275-68-3 | Cyclohepta[b]pyrrole | C9H7N | 129.16 | | |
| 11 | 275-70-7 | Cycloheptapyrazole | C8H6N2 | 130.15 | | |
| 12 | 275-76-3 | 2H-Cyclohepta[b]furan (8CI,9CI) | C9H8O | 132.16 | | |
| 13 | 275-93-4 | Cyclohepta-1,3,2-diazaborole (8CI,9CI) | C7H5BN2 | 127.94 | | |
| 14 | 275-94-5 | Cycloheptimidazole | C8H6N2 | 130.15 | | |
| 15 | 275-95-6 | Cycloheptatriazole | C7H5N3 | 131.13 | | |
| 16 | 275-97-8 | 2λ4-Cyclohepta[1,2,5]thiadiazole (9CI) | C7H6N2S | 150.2 | | |