M 2093 (OTTO) 1-Methyl-3-formylindole, 97% Cas 19012-03-4 - used in the synthesis of (Z)-3-(1-methyl-1H-indol-3-yl)-2-(thiophen-3-yl)acrylonitrile, via base-catalyzed condensation with thiophene-3-acetonitrile. It was also used in the preparation of monomer, required for the synthesis of poly(3-vinyl-1-methylindole).