Polydiethylstilbestrol phosphate (PSP, PDSP) is an estrogen medication which has been used in scientific research and has been studied for use in veterinary medicine as a livestock growth promoter. It is a phosphate ester of diethylstilbestrol (DES) in the form of a polymer and is a polymeric form of fosfestrol (diethylstilbestrol diphosphate); PDSP acts as a long-lasting prodrug of DES. It has similarities to polyestradiol phosphate and polyestriol phosphate.
See also List of estrogen esters § Diethylstilbestrol esters Polytestosterone phloretin phosphate
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