2,2-Diphenylpropionic acid 2-(diethylamino)ethyl ester hydrochloride 2-Diethylaminoethyl 2,2-diphenylpropionate hydrochloride 2589-00-6 3563-01-7 Aprofen hydrochloride Aprofene hydrochloride Aprophen hydrochloride Propionic acid, 2,2-diphenyl-, 2-(diethylamino)ethyl ester, hydrochloride