Fexofenadine EP Impurity D

Chemical Name: Fexofenadine Methyl Ester ; Decarboxylated degradant ; methyl (R)-2-(4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)piperidin-1-yl)butyl)phenyl)-2-methylpropanoate

Smile: OC(C1=CC=CC=C1)(C2CCN(CCC[C@](O)([H])C3=CC=C(C(C(OC)=O)(C)C)C=C3)CC2)C4=CC=CC=C4