1-Methyl-4-vinylethynyl-4-benzoyloxypiperidine hydrochloride 106010-31-5 4-(3-Buten-1-ynyl)-1-methyl-4-piperidinol benzoate (ester), hydrochloride 4-Piperidinol, 4-(3-buten-1-ynyl)-1-methyl-, benzoate (ester), hydrochloride