| Unknown | ||||
| Name | Format | Size | Date | |
|---|---|---|---|---|
| 18-anulene | Unknown | 405b | 1990-01-07 | |
| acenaphthylene | Unknown | 300b | 1988-07-26 | |
| acepleiadylene | Unknown | 401b | 1988-07-30 | |
| anthracene | Unknown | 331b | 1988-07-26 | |
| azulene | Unknown | 233b | 1988-07-26 | |
| benzene | Unknown | 135b | 1988-07-13 | |
| biphenylene | Unknown | 289b | 1988-07-26 | |
| coronene | Unknown | 597b | 1990-01-07 | |
| fluoranthene | Unknown | 403b | 1989-12-15 | |
| heptafulvalene | Unknown | 275b | 1988-07-30 | |
| heptalene | Unknown | 275b | 1988-07-30 | |
| isopyrene | Unknown | 387b | 1988-07-26 | |
| naphthalene | Unknown | 233b | 1988-07-26 | |
| non-kekule | Unknown | 549b | 1990-01-13 | |
| octalene | Unknown | 317b | 1988-07-30 | |
| pentalene | Unknown | 191b | 1988-07-30 | |
| phenanthrene | Unknown | 331b | 1988-07-26 | |
| phthalocyanine | Unknown | 955b | 1988-07-30 | |
| pleiadene | Unknown | 345b | 1988-07-29 | |
| porphin | Unknown | 565b | 1989-12-16 | |
| pyracylene | Unknown | 345b | 1988-07-30 | |
| pyrene | Unknown | 387b | 1988-07-26 | |
| s-indacene | Unknown | 289b | 1988-07-26 | |
| tetracene | Unknown | 429b | 1988-07-26 | |