Synonyms: 4-Piperidinol,1,3-dimethyl-4-phenyl-, propanoate (ester), hydrochloride, (3R,4S)-rel-(9CI);Alphaprodine hydrochloride;Nisentil;Nisintel;Nu 1196;Prisilidene;Prisilidene hydrochloride;dl-1,3-Dimethyl-4-phenyl-4-piperidinol propionatehydrochloride;dl-Alphaprodine hydrochloride;a-Prodine hydrochloride