Tetracyclic compounds
US5371225A · kind A · utility
0Cited by
2References
1Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 22, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Dec 22, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D221/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to novel tetracyclic compounds represented by formula (I) ##STR1## (wherein each of X.sup.1 and X.sup.2 independently represents hydrogen or lower alkyl; n represents an integer of 1 to 4), or a pharmaceutically acceptable salt thereof, which are useful as immunosuppressive agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.