European Pharmacopoeia (EP) Reference Standard Synonym(s): Tamoxifen citrate salt; (Z)-1-(p-Dimethylaminoethoxyphenyl)-1,2-diphenyl-1-butene Amino Acid Sequence: Empirical Formula: C₂₆H₂₉NO -+ C₆H₈O₇ Formula Weight: 563.64 …