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CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category


Chemical Name

16α,17-Dihydroxypregn-4-ene-2,30-dione (WHO)

Foreign Names

  • Algestonum (Latin)
  • Algeston (German)
  • Algestone (French)
  • Algestona (Spanish)

Generic Names

  • Algestone (OS: DCIT)
  • Alfasol (IS)
  • Alfasone (IS)
  • Algestonum (IS)
  • Dihydroxyprogesteron (IS)
  • Neo-Alfasol (IS)
  • Algestone Acetonide (OS: USAN, BAN)
  • Algestone cyclic 16,17-acetal with acetone (IS)
  • W 3395 (WarnerChilcott) (IS)

Brand Names

  • Algestona + Estradiol Gen.Legrand [+ Estradiol]
    Genéric.Legrand, Brazil
  • Clinomin [+ Estradiol]
    Duperu-Indufar, Peru; Medical Farmac, Paraguay
  • Novulex [+ Estrogens, conjugated]
    Leclerc, Paraguay
  • Perlutin-Unifarma [+ Estradiol]
    Unifarma, Paraguay
  • Unalmes [+ Estradiol]
    Laboratorios Andromaco, Chile
  • Novular [+ Estradiol]
    Paill, Belize
  • Perlumes [+ Estradiol]
    Nova Química Farmacêutica, Brazil
  • Preg-Less [+ Estradiol]
    Sigma Pharma Nature's Plus Farm. Ltda., Brazil
  • Pregnolan [+ Estradiol]
    Mabra Farmaceutica, Brazil
  • Topasel [+ Estradiol]
    Boehringer Ingelheim, Costa Rica; Boehringer Ingelheim, Dominican Republic; Boehringer Ingelheim, Guatemala; Boehringer Ingelheim, Honduras; Boehringer Ingelheim, Nicaragua; Boehringer Ingelheim, Panama
  • Yectames [+ Estradiol]
    Grossman, Costa Rica; Grossman, Dominican Republic; Grossman, Guatemala; Grossman, Honduras; Grossman, Nicaragua; Grossman, Panama; Grossman, El Salvador


BANBritish Approved Name
DCITDenominazione Comune Italiana
ISInofficial Synonym
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name
WHOWorld Health Organization

Further information on drug naming conventions: International Nonproprietary Names.

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Further information

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