2-Pyridinecarboxaldehyde-1-oxide-3,4-dimethoxybenzene sulfonylhydrazone 3,4-Dimethoxybenzenesulfonic acid (2-pyridinylmethylene)hydrazide N-oxide 3,4-Dimethoxybenzenesulfonylhydrazone of 2-pyridinecarboxaldehyde-1-oxide 73736-93-3 BRN 5624423 Benzenesulfonic acid, 3,4-dimethoxy-, (2-pyridinylmethylene)hydrazide, N-oxide NSC 341912