1-Methyl-4-vinylethynyl-4-propionyloxypiperidine hydrochloride 106010-30-4 4-(3-Buten-1-ynyl)-1-methyl-4-piperidinol propanoate (ester), hydrochloride 4-Piperidinol, 4-(3-buten-1-ynyl)-1-methyl-, propanoate (ester), hydrochloride