3,3-Diphenyl-3-hydroxypropionic acid diethylaminoethyl ester hydrochloride 53421-38-8 DPE-HCl Diethylaminoethyl diphenylhydroxypropionate hydrochloride Hydracrylic acid, 3,3-diphenyl-, 2-(diethylamino)ethyl ester, hydrochloride