63951-49-5 GLYCINE, 2-PHENYL-N-(2-(1-PYRROLIDINYL)ETHYL)-, ISOPENTYL ESTER, BIS(HYDROGEN MA Glycine, 2-phenyl-N-(2-(1-pyrrolidinyl)ethyl)-, isopentyl ester, bis(hydrogen maleate) Isopentyl alpha-(2-pyrrolidin-1'-ylethylamino)phenylacetate di(hydrogen maleate)