Girish Mahajan (Editor)

1 Keto 1,2,3,4 tetrahydrophenanthrene

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
CAS Number  573-22-8
ChemSpider  196209
Formula  C14H12O2
PubChem CID  225683

Synonyms  THP-1; 1,2,3,4-Tetrahydrophenanthren-1-one

1-Keto-1,2,3,4-tetrahydrophenanthrene (THP-1), or 1,2,3,4-tetrahydrophenanthren-1-one, is a synthetic, steroid-like estrogen, and was reported to be the first synthetic estrogen, or the first synthetic compound identified with estrogenic activity. It was first synthesized in 1933 by Cook et al and was tested due to its similarity to the presumed chemical structure of estrone. Upon reassessment many decades later, the compound was found to bind only weakly to the estrogen receptors and, unexpectedly, was without functional activity as an estrogen or antiestrogen in vitro or in vivo. It did, however, show some androgenic and antiandrogenic activity in vitro.


1-Keto-1,2,3,4-tetrahydrophenanthrene Wikipedia