4-Piperidinol, 4-cyclohexyl-1-methyl-, propionate, hydrochloride 63916-48-3 NU-1333 Piperidine, 4-cyclohexyl-1-methyl-4-propionyloxy-, hydrochloride Propionic acid, 4-cyclohexyl-1-methyl-4-piperidyl ester, hydrochloride