3,4-Bis(p-acetoxyphenyl)-2,4-hexadiene 84-19-5 Dienestrol diacetate Farmacyrol Lipamone NSC81279 Phenol, 4,4'-(1,2-diethylidene-1,2-ethanediyl)bis-, diacetate Phenol, 4,4'-(diethylideneethylene)di-, diacetate Retalon-Oral