<unk>  is a synthetic nonsteroidal estrogen of the stilbestrol group. It is an estrogen ester; specifically, it is the diphosphate ester of diethylstilbestrol.<unk>  is provided both as the free base and as a tetrasodium salt. In terms of dose equivalence, 300 mg anhydrous<unk>  sodium is equal to about 250 mg<unk> . A polymer of<unk> , polydiethylstilbestrol phosphate, was developed as a long-acting estrogen for potential use in veterinary medicine, but was never marketed.
Fosfestrol
Hexestrol
Gestodene
Benzestrol
Moxestrol
Dienestrol
Dimestrol
Goserelin