1. Quick Detail: Product Name: estradiol benzoate Synonyms: beta-Estradiol-3-benzoate; Oestradiol Benzoate; 17beta-Estradiol benzoate; 1,3,5(10)-Estratriene-3,17b-diol ... )-Estra-1,3,5(10)-triene-3,17-diol 3-benzoate CAS: 50-50-0 EINECS: 200-043-7 MF: ... , Progynon-B, many others), or oestradiol benzoate (BAN), is a synthetic ester, specifically the 3-benzoyl ester, of the natural estrogen, estradiol ...