Compound effective as cerebral insufficiency improver
US5292768A · kind A · utility
11Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Nov 23, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/66
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound having the formula (I): ##STR1## wherein A is --CH.sub.2 --, --O--, or --S--; R.sup.1 is CH.sub.3 or OCH.sub.3 ; R.sup.2 is hydroxy or carboxy which may be optionally esterized or amidated; R.sup.3 is H or a lower alkyl; and n is 0 or an integer of 1 to 6 or a pharmaceutically acceptable salt thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.