1-Allyl-2,5-dimethyl-4-piperidol benzoyl ester hydrochloride 2,5-Dimethyl-1-(2-propenyl)-4-piperidinol benzoate 32066-26-5 4-Piperidinol, 2,5-dimethyl-1-(2-propenyl)-, benzoate (ester) Rhinocaine Ridocaine Rinocaine