Benzeneacetic acid, 4-[1-hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-a-methyl-;BENZENEACETIC ACID, 4-[1-HYDROXY-4-[4-(HYDROXYDIPHENYLMETHYL)-1-PIPERIDINYL]BUTYL]--METHYL-;Fexofenadine EP Impurity F;Fexofenadine EP Impruity F;Fexofenadine hydrochloride impurity F (EP);2-(4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)piperidin-1-yl)butyl)phenyl)propanoic acid;Fexofenadine Impurity F