1-(3-Phenylpropyn-2-yl)-2,3-dimethyl-4-gamma-ethynyl-4-acetoxypiperidine hydrochloride Piperidin-4-equatorial-ol, 2-equatorial,3-equatorial-dimethyl-4-axial-ethynyl-1-(3-phenyl-2-propynyl)-, acetate (ester), hydrochloride TN6998800