Ambenonium Chloride: C~28~H~42~Cl~4~N~4~O~2~. Mw: 608.47. (1) Benzenemethanaminium, N,N’-[(1,2-dioxo-1,2-ethanediyl)bis(imino-2,1-ethanediyl)]bis[2-chloro-N,N-diethyl-, dichloride; (2) [Oxalylbis(iminoethylene)]bis[(o-chlorobenzyl)diethylammonium] dichloride. CAS-115-79-7; CAS-52022-31-8 (tetrahydrate); CAS-7648-98-8 (ambenonium).