| 1 | 176-00-1 | 2,3,7,8-Tetraazaspiro[4.4]nonane | C5H12N4 | 128.18 | | |
| 2 | 176-02-3 | PH 800/20 | C5H8S4 | 196.38 | | |
| 3 | 176-03-4 | 1-azaspiro[4.4]nonane | C8H15N | 125.21 | | |
| 4 | 176-05-6 | 1,2,7-Triazaspiro[4.4]nonane (8CI,9CI) | C6H13N3 | 127.19 | | |
| 5 | 176-12-5 | 1-Oxa-7-aza-spiro[4.4]nonane | C7H13NO | 127.18422 | | |
| 6 | 176-23-8 | 1-Oxa-6-azaspiro[4.4]nonane (8CI,9CI) | C7H13NO | 127.18 | | |
| 7 | 176-25-0 | 1,6-Dioxaspiro[4.4]nonane | C7H12O2 | 128.17 | | |
| 8 | 176-32-9 | 1,4-DIOXASPIRO(4.4)NONANE | C7H12O2 | 128 | | |
| 9 | 176-33-0 | 1,4-DIOXA-7-AZA-SPIRO[4.4]NONANE | C6H11NO2 | 129.15704 | | |
| 10 | 176-35-2 | 1,4-DIOXA-7-THIASPIRO[4.4]NONANE | C6H10O2S | 146.21 | | |
| 11 | 176-37-4 | 1,4,6-Trioxaspiro[4.4]nonane | C6H10O3 | 130.14 | | |
| 12 | 176-38-5 | Cyclopentanone O,S-ethylenethioacetal | C7 H12 O S | 144.23 | | |
| 13 | 176-39-6 | 1,4-Dithiaspiro[4.4]nonane(7CI,8CI,9CI) | C7H12S2 | 160.3 | | |
| 14 | 176-41-0 | 1,4,7-trithia-spiro[4.4]nonane | C6H10S3 | 178.34 | | |
| 15 | 176-47-6 | 1,4,6,9-Tetraoxa-5-germaspiro[4.4]nonane | C4H8GeO4 | 192.74 | | |
| 16 | 176-49-8 | 1,1'-Spirobipyrrolidinium | | | | |
| 17 | 176-51-2 | Ditetramethylenesilane | C8H16Si | 140.3 | | |
| 18 | 176-54-5 | 1,4,6,9-Tetrathia-5-silaspiro[4.4]nonane | C4H8S4Si | 212.45 | | |
| 19 | 176-57-8 | 1,4,6,9-tetraoxa-5$l^{4}-telluraspiro[4.4]nonane | C4H8O4Te | 247.70392 | | |
| 20 | 176-63-6 | spiro[4.5]decane | C10H18 | 138.25 | | |
| 21 | 176-64-7 | 8-AZASPIRO[4.5]DECANE | C9H17N | 139.24 | | |
| 22 | 176-66-9 | 2-AZASPIRO[4,5]DECANE | C9H17N | 139.24 | | |
| 23 | 176-67-0 | 2,8-diazaspiro[4.5]decane | C8H16N2 | 140.22604 | | |
| 24 | 176-69-2 | 2-Oxa-8-azaspiro[4.5]decane | C8H15NO | 141.21 | | |
| 25 | 176-72-7 | 2,3-Dithio-4,5-spirodecane | C8H14S2 | 174.33 | | |
| 26 | 176-73-8 | 7-Azaspiro[4.5]decane | C9H17N | 139.24 | | |
| 27 | 176-74-9 | 2-Oxa-7-azaspiro[4.5]decane (8CI,9CI) | C8H15NO | 141.2108 | | |
| 28 | 176-80-7 | 1-Azaspiro[4.5]decane | C9H17N | 139.23 | | |
| 29 | 176-91-0 | 1-Oxaspiro[4.5]decane | C9H16O | 140.22274 | | |
| 30 | 176-92-1 | 1-Oxa-8-azaspiro[4.5]decane | C8H15NO | 141.21 | | |
| 31 | 176-95-4 | spiro-oxazolidine | C8H15NO | 141.21 | | |