(2-(N-(2-Hydroxyethyl)anilino)ethyl) hydrogen maleate 15772-26-6 2-Butenedioic acid (2Z)-, mono(2-((2-hydroxyethyl)phenylamino)ethyl) ester EINECS 239-864-0 Maleic acid, mono(2-(N-(2-hydroxyethyl)anilino)ethyl) ester