Clinical data
Trade names Honvan, Difostilben, Fosfostilben, Fostrolin, Stilbol, Stilphostrol, Vagestrol
Synonyms Diethylstilbestrol diphosphate; Stilbestrol diphosphate; DESDP; DESP
AHFS/ International Drug Names
Routes of
Intramuscular injection
Drug class Nonsteroidal estrogen; Estrogen ester
ATC code
Legal status
Legal status
  • In general: ℞ (Prescription only)
CAS Number
PubChem CID
ECHA InfoCard 100.007.573
Chemical and physical data
Formula C18H22O8P2
Molar mass 428.310 g/mol
3D model (JSmol)
 NY (what is this?)  (verify)

Fosfestrol (INN, BAN, JAN) (brand names Honvan, Difostilben, Fosfostilben, Fostrolin, Stilbol, Stilphostrol, Vagestrol, among others), also known as diethylstilbestrol diphosphate (USAN), abbreviated as DESDP or DESP, is a synthetic nonsteroidal estrogen of the stilbestrol group which is or has been used in the treatment of prostate cancer.[1][2] It is a prodrug of diethylstilbestrol.[3] The drug has been marketed widely throughout the world, including in the United States, Canada, Europe, Hong Kong, and Mexico.[1]

See also


  1. 1 2 Index Nominum 2000: International Drug Directory. Taylor & Francis. January 2000. pp. 332–. ISBN 978-3-88763-075-1.
  2. Shanbhag (1 January 2008). Pharmacology: Prep Manual for Undergraduates. Elsevier India. pp. 463–. ISBN 978-81-312-1153-3.
  3. Urotext (1 January 2001). Urotext-Luts: Urology. Urotext. pp. 386–. ISBN 978-1-903737-03-3.

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