Synonyms Monomethylstilbestrol
CAS Number 18839-90-2
PubChem (CID) 3032340
ChemSpider 2297337
Chemical and physical data
Formula C19H22O2
Molar mass 282.37678 g/mol
3D model (Jmol) Interactive image

Mestilbol (brand name Monomestro or Monomestrol), also known as diethylstilbestrol monomethyl ether, is a synthetic, non-steroidal estrogen of the stilbestrol group related to diethylstilbestrol.[1][2][3] It was developed by Wallace & Tiernan Company,[3] patented in 1940,[4] and introduced for medical use in the 1940s,[5] but is now no longer marketed. Mestilbol was available both as oral tablets and in oil for intramuscular injection.[3][6] The drug is gradually demethylated in the body into diethylstilbestrol and hence is a prodrug of diethylstilbestrol.[7] Mestilbol is a highly active estrogen,[6] although somewhat less so than diethylstilbestrol,[8] but is longer-lasting in comparison.[9]

See also


  1. J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. p. 396. ISBN 978-1-4757-2085-3.
  2. Martin Negwer (1987). Organic-chemical drugs and their synonyms: (an international survey). VCH Publishers. p. 923. ISBN 978-0-89573-552-2.
  3. 1 2 3 Council on Drugs (American Medical Association) (1955). New and Nonofficial Drugs. Lippincott. pp. 419–420.
  5. Sevringhaus, Elmer L. (1944). "Therapy of the Patient in the Menopause: Endocrine Methods". The Journal of Clinical Endocrinology & Metabolism. 4 (12): 597–604. doi:10.1210/jcem-4-12-597. ISSN 0021-972X.
  6. 1 2 Postgraduate Medicine. McGraw-Hill. 1949. p. 347.
  7. Annales de Bourgogne. Centre d'études bourguignonnes. 1940.
  8. Russell La Fayette Cecil; Robert Frederick Loeb (1951). A Textbook of Medicine. Saunders.
  9. William Thomas Salter (1952). A Textbook of Pharmacology: Principles and Application of Pharmacology to the Practice of Medicine. Saunders.

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