159389-12-5 4-(1-Hydroxy-4-(4-(hydroxydiphenylmethyl)-1-piperidinyl)butyl)-alpha,alpha-dimethylbenzeneacetic acid 76815-58-2 83799-24-0 Benzeneacetic acid, 4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)-1-piperidinyl)butyl)-alpha,alpha-dimethyl- Carboxyterfenadine Fexofenadine MDL 16455 Terfenadine acid metabolite Terfenadine carboxylate Terfenadine-COOH