European Pharmacopoeia (EP) Reference Standard Synonym(s): 1-[4-(1,1-Dimethylethyl)phenyl]-4-[4-(hydroxydiphenylmethyl)piperidin-1-yl]butan-1-one Amino Acid Sequence: Empirical Formula: C₃₂H₃₉NO₂ Formula Weight: 469.66 Linear Formula: …