Skip to Content




ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Antineoplastic agent


Chemical Names

α,α'-Dietyl-(E)-4,4'-stilbenediol bis(dihydrogen phosphate) (USP)

α,α'-Dietyl-4,4'-stilbenediol bis(di-H phosphate) (WHO)

(E)-4,4'-(1,2-Dietylvinylene)bis(phenyl dihydrogen ortophosphate) (BAN)

(E)-4,4'-(Hex-3-ene-3,4-diyl)bis(phenyl dihydrogen phosphate) (JP)

4,4'-[(1E)-1,2-Dietyl-1,2-etenediyl]bisphenol bis(dihydrogen phosphate)

Phenol, 4,4'-(1,2-dietyl-1,2-etenediyl)bis-, bis(dihydrogen phosphate), (E)- (USP)

Foreign Names

  • Fosfestrolum (Latin)
  • Fosfestrol (German)
  • Fosfestrol (French)
  • Fosfestrol (Spanish)

Generic Names

  • Fosfestrol (OS: BAN, JAN)
  • Fosfestrolo (OS: DCIT)
  • Diethyldihydroxystilbene diphosphate (IS)
  • Diethylstilbestryl diphosphate (IS)
  • St 52-Asta (IS)
  • Stilbestrol diphosphate (IS)
  • UNII-A0E0NMA80F (IS)
  • Diethylstilbestrol Diphosphate (PH: USP 33)
  • Fosfestrol (PH: JP XV)
  • Fosfestrol Sodium (OS: BANM)
  • ST-52 (IS)
  • Stilbostatin (IS)
  • Fosfestrol Sodium (PH: BP 2016)

Brand Names

  • Honovan
    AstraZeneca, Egypt
  • Honvan
    Zydus, India; ASTA Medica, Pakistan


BANBritish Approved Name
BANMBritish Approved Name (Modified)
DCITDenominazione Comune Italiana
ISInofficial Synonym
JANJapanese Accepted Name
JPThe Japanese Pharmacopoeia
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USPPharmacopoeia of the United States
WHOWorld Health Organization

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.