2,2'-Oxalylbis(1-methylpyridinium iodide) dioxime 80716-13-8 Di(2-pyridyl)glyoxime dimethiodide Pyridinium, 2,2'-(1,2-bis(hydroxyimino)-1,2-ethanediyl)bis(1-methyl-, diiodide Pyridinium, 2,2'-oxalylbis(1-methyl-, diiodide, dioxime RA-56