(E)-1,2,5,6-Tetrahydro-1-methyl-3-pyridinecarboxaldehyde O-ethyloxime, monohydrochloride 139886-22-9 3-Pyridinecarboxaldehyde, 1,2,5,6-tetrahydro-1-methyl-, O-ethyloxime, monohydrochloride, (E)-