Patent · US Expired

Xanthine derivatives

US4233303A · kind A · utility

20Cited by

2References

12Claims

0Family size

Assignee

DRACO LTD. · SE

Inventors

Sten Håkan Axel Bergstrand · Bjärred, SE
Per Kjellin · Lund, SE
Carl G. A. Persson · Löberöd, SE
Lars M. Sorenby · Lund, SE

Key dates

Filing date	Sep 29, 1978
Grant date	Nov 11, 1980
Priority date	—
Expiry date	Sep 29, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D473/06
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Compounds of the formula ##STR1## or physiologically acceptable salts thereof in which formula R.sup.1 is methyl, ethyl or n-propyl, R.sup.2 is methyl or n-propyl and R.sup.3 is ##STR2## methods for the preparation thereof; intermediates useful for their preparation; pharmaceutical preparations containing at least one of these compounds; and the use thereof in the treatment of allergy and bronchial asthma.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.