1-Methyl-1,2,5,6-tetrahydropyridine-3-carboxaldehyde-O-allyloxime hydrochloride 139886-25-2 3-Pyridinecarboxaldehyde, 1,2,5,6-tetrahydro-1-methyl-, O-2-propenyloxime, monohydrochloride,(E)-