Oleamide is the carboxylic acid amide of oleic acid. "ethyldimonium" is a secondary amine with 2 methyl and 1 ethyl group, "ethosulfates" is the ethyl ester of sulfuric acid.
Oleamidopropyl dimethylamine ethosulfate is used in cosmetic formulations. The substance acts as an antistatic agent (reduces static charges by neutralizing the electric charge on the surface, e.g. of hair).