2-((2-((1-Oxooctadecyl)amino)ethyl)amino)ethyl stearate 68900-94-7 EINECS 272-643-7 N-(Octadecanoyloxyethylaminoethyl)stearamide Octadecanoic acid, 2-((2-((1-oxooctadecyl)amino)ethyl)amino)ethyl ester