(8-Substituted-10-hydroxy-5,5-dimethyl-1,2,3,4-tetrahydro-5H-(1)benzopyrano(4,3-C)pyridin-2-yl)acetyl ureas and derivatives

摘要

A compound of the formula <IMAGE> wherein R1 is H or loweralkyl; R2 is H, loweralkyl, phenyl or substituted phenyl; R is C3-C20 alkyl, phenyl alkyl or substituted phenyl alkyl; R3 is H or <IMAGE> where X is a straight or branched chain alkylene group of 3 to 4 carbon atoms, and R4 and R5 are the same or different members of the group consisting of H or loweralkyl; or R4 and R5 taken together form a 6- or 6- member heterocyclic ring and containing no more than one additional heterocyclic atom, with or without alpha -loweralkyl substituents, and the acid addition salts thereof.