6-thioxanthines
US4925847A · kind A · utility
21Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1987 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jul 28, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P11/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A 6-thioxanthine of general formula I or a pharmaceutically acceptable salt thereof ##STR1## wherein R.sub.3 is a C.sub.2 to C.sub.6 alkyl, a C.sub.3 to C.sub.7 cycloalkyl group or a C.sub.4 to C.sub.8 cycloalkylalkyl group and R.sub.8 is a C.sub.1 to C.sub.6 alkyl, a C.sub.3 to C.sub.7 cycloalkyl group or a C.sub.4 to C.sub.8 cycloalkylalkyl group provided that when R.sub.3 is an ethyl, n-propyl or n-butyl group, R.sub.8 is a C.sub.3 to C.sub.6 alkyl, a C.sub.3 to C.sub.7 cycloalkyl group or a C.sub.4 to C.sub.8 cycloalkylalkyl group. These 3,8-disubstituted-6-thioxanthines have enhanced bronchodilator activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.