Pyrazolo[3,4-b]pyridine compounds which are useful for their activity in the central nervous system of warm-blooded animals, of the formula:
wherein R, is lower alkyl, Ra is hydrogen and Rb is hydroxy or Ra and Rb combine to form a = 0 group, R5 is hydrogen or lower alkyl, and Re is lower alkyl, and the pharmaceutically-acceptable salts thereof. Process for the manufacture of said compounds. Pharmaceutical compositions comprising one of said compounds and a pharmaceutically-acceptable diluent or carrier.
Certain pyrazolo[3,4-b]pyridine compounds which are useful for their activity in the central nervous system of warm-blooded animals, of the following formula (I) ##STR1## wherein R.sub.1 is lower alkyl; R.sub.a is hydrogen and R.sub.b is hydroxy or R.sub.a and R.sub.b combine to form a .dbd.O group; R.sub.5 is hydrogen or lower alkyl; and R.sub.6 is lower alkyl, and the pharmaceutically-acceptable salts thereof.