1-Butyl-4-phenyl-4-butyroxypiperidine hydrochloride 1-Butyl-4-phenyl-4-piperidinol butyrate hydrochloride 102658-09-3 4-Piperidinol, 1-butyl-4-phenyl-, butyrate, hydrochloride Butyric acid, 1-butyl-4-phenyl-4-piperidyl ester, hydrochloride NU-804