1-Methyl-4-piperidinol hydrochloride (CAS NO.34737-83-2), its Synonyms are 1-Methyl-4-piperidone HCl ; 1-Methyl -4- piperidinol ; 1-Methylpiperidin-4-ol hydrochloride (1:1) ; 4-piperidinol, 1-methyl-, hydrochloride (1:1) .