1H-Pyrazolo(3,4-b)pyridine-5-carboxylic acid, 1-ethyl-4-((1-methylethylidene)hydrazino)-, ethyl ester, monohydrochloride 35838-58-5 ETAZOLATE HYDROCHLORIDE, C-14 Etazolate hydrochloride [USAN] Ethyl 1-ethyl-4-(isopropylidenehydrazino)-1H-pyrazolo(3,4-b)pyridine-5-carboxylate monohydrochloride NSC 163611 SQ 20009