3426-58-2 IN 391 Isotensen Methindethyrium NSC19481 Pyridinium, 4-[2-(1-methyl-1H-indol-3-yl)ethyl]-1-[3-(trimethylammonio)propyl]-, dichloride Pyridinium, 4-[2-(1-methylindol-3-yl)ethyl]-1-[3-(trimethylammonio)propyl]-, dichloride