Estriol phosphate
Estriol phosphate, or estriol 17β-phosphate, also known as estra-1,3,5-triene-3,16α,17β-triol 17β-, is an estrogen which was never marketed. It is an estrogen ester, specifically an ester of estriol with phosphoric acid, and acts as a prodrug of estriol by cleavage via phosphatase enzymes in the body. Estriol phosphate is contained within the chemical structure of polyestriol phosphate, and this medication has been marketed for medical use.
