Pyrazolopyridine ketones

Abstract From the Canadian patent

New pyrazolo3,4-bpyridine-5-ketones having the general formula, as well as their salts wherein R1 is hydrogen lower alkyl, or phenyl-lower alkylene; R2 and R5 each is hydrogen or lower alkyl; R3 is hydroxy, lower alkoxy or wherein, R6 is hydrogen or lower alkyl and R7 is hydrogen lower, alkyl, cyclo-lower alkyl, phenyl phenyl-lower alkylene or, di-lower alkylamino-lower alkylene; R4 is pyrrolidinyl thienyl, furanyl, pyrazolyl, piperidinyl pyridyl, pyrimi-, dinyl, pyridazinyl, piperazinyl (lower alkyl)piperidinyl, di(lower alkyl)piperidinyl or (hydroxy-lower alkyl)piperazinyl; and acid addition salts thereof are useful as antiinflammatory agents and tranquilizers.