(E)-1-Propyl-1,2,5,6-tetrahydro-3-pyridinecarboxaldehyde O-methyloxime monohydrochloride 139886-05-8 3-Pyridinecarboxaldehyde, 1,2,5,6-tetrahydro-1-propyl-, O-methyloxime, monohydrochloride, (E)-