: E 1607 (OTTO) 1-Ethyl-2-methylindole, 97% Cas 40876-94-6 - used in synthesis of hetrocyclic indole compounds. Reactant for preparation of (2-hydroxyethyl)ammonium salts of 1-R-indol-3-ylsulfanyl(sulfonyl)alkanecarboxylic acids as potential immunomodulators.