1,2,3,4-Tetrahydro-6-methoxy-2-(piperidinomethyl)-1-naphthol propionate hydrochloride 1-Naphthol, 1,2,3,4-tetrahydro-6-methoxy-2-(piperidinomethyl)-, propionate, hydrochloride 2-Piperidinomethyl-6-methoxy-1-propionoxy-1,2,3,4-tetrahydronaphthalene hydrochloride NU-761 QL5423000