Importance

Loading Importance Indicators...

Abstract

Pharmaceutical compound of the formula ##STR1## R.sup.1 is phenyl or heteroaryl selected from thienyl, pyridyl, benzothienyl, quinolinyl, benzofuranyl or benzimidazolyl, said phenyl and heteroaryl groups being optionally substituted, or R.sup.1 is furanyl optionally substituted with C.sub.1-4 alkyl; R.sup.2 is nitrile, carboxy, --COOR.sup.4 where R.sup.4 is an ester group, --CONR.sup.5 R.sup.6 where R.sup.5 and R.sup.6 are each hydrogen or C.sub.1-4 alkyl, or R.sup.7 SO.sub.2 -- where R.sup.7 is C.sub.1-4 alkyl or optionally substituted phenyl; R.sup.3 is --NR.sup.8 R.sup.9, --NHCOR.sup.8, --N(COR.sup.8).sub.2, --N.dbd.CHOR.sup.8 where R.sup.8 and R.sup.9 are each hydrogen or C.sub.1-4 alkyl, or --NHSO.sub.2 R.sup.10 where R.sup.10 is C.sub.1-4 alkyl or optionally substituted phenyl; or ##STR2## where X is C.sub.2-4 alkylene; and the group ##STR3## represents a pyridine ring fused to the benzopyran nucleus; and salts thereof.

Loading the Abstract Image...

First Claim