... 4,4'-carbonimidoylbis(N,N-dimethyl-, monohydrochloride;C.I. Basic yellow 2;4,4'-(imidocarbonyl)bis(n,n-dimethyl-anilin hydrochloride;1, ... 1-bis(p-dimethylaminophenyl)methylenimine hydrochloride;4,4'-(imidocarbonyl)bis(n,n-dimethylamine), ... in 150-160 °C heating system, or by N, N- two methyl aniline and formaldehyde condensation and oxidation ...