.beta.-(4-Imidazolyl)acrylcholine chloride hydrochloride 6032-82-2 Choline, chloride, imidazole-4-acrylate, monohydrochloride Ethanaminium, 2-[[3-(1H-imidazol-4-yl)-1-oxo-2-propenyl]oxy]-N,N,N-trimethyl-, chloride, monohydrochloride Murexine chloride hydrochloride NSC172794 Urocanylcholine chloride hydrochloride