| 1 | 174-24-3 | 4a,8a-Epoxynaphthalene (8CI,9CI) | C10H8O | 144.17 | | |
| 2 | 174-66-3 | 1',2'-dihydrospiro[cyclopropane-1,3'-indole] | C10H11N | 145.2 | | |
| 3 | 174-73-2 | Tricyclo[4.1.0.01,3]heptane | C7H10 | 94.15 | | |
| 4 | 174-74-3 | Spirobicyclobutane | C7H12 | 96.17 | | |
| 5 | 174-75-4 | 2-oxaspiro[3,3]heptane | C6H10O | 98.14 | | |
| 6 | 174-77-6 | 2,6-DIAZASPIRO[3.3]HEPTANE | C5H10N2 | 98.148 | | |
| 7 | 174-78-7 | 2-oxa-6-azaspiro[3.3]heptane | C12H20N2O6 | 288.3 | | |
| 8 | 174-79-8 | 2,6-dioxaspiro[3.3]heptane | C5H8O2 | 100.116 | | |
| 9 | 174-80-1 | 2-oxa-6-thiaspiro[3.3]heptane | C5H8OS | 116.18 | | |
| 10 | 174-81-2 | 2,6-Dithiaspiro[3.3]heptane | C5H8S2 | 132.24702 | | |
| 11 | 174-82-3 | 2,6-Diselenaspiro[3.3]heptane | C5H8Se2 | 226.04 | | |