2-Ethyl-3-methyl-2-phenylvaleric acid 2-(diethylamino)ethyl ester hydrochloride 29620-40-4 Benzeneacetic acid, alpha-ethyl-alpha-(1-methylpropyl)-, 2-(diethylamino)ethyl ester, HCl GP 249 hydrochloride Pentanoic acid, 2-ethyl-3-methyl-2-phenyl-, 2-(diethylamino)ethyl ester, hydrochloride Valeric acid, 2-ethyl-3-methyl-2-phenyl-, 2-(diethylamino)ethyl ester, monohydrochloride