Fexofenadine HCl Standard

Carboxyterfenadine Hydrochloride; Terfenadinecarboxylate Hydrochloride; (±)-4-[1-Hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-a,a-dimethylbenzeneacetic Acid Hydrochloride; 4-[1-hydroxy-4-[4-(hydroxy diphenylmethyl)-1-piperidinyl]butyl]-α,α-dimethyl-, hydrochloride; 4-[1-Hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-α,α-dimethylbenzeneacetic Acid Hydrochloride