4-Piperidinol, 1-butyl-4-cyclohexyl-, propionate, hydrochloride 63916-28-9 NU-1109 Piperidine, 1-butyl-4-cyclohexyl-4-propionyloxy-, hydrochloride Propionic acid, 4-(1-butyl-4-cyclohexyl)piperidyl ester, hydrochloride