Cook, C., Kepler, J., & Bartley, GS. (2001). 17.beta.-amino and hydroxylamino-11.beta.-arylsteroids and their derivatives having agonist or antagonist hormonal properties. (U.S. Patent No. 6262042). http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6262042
The invention is directed to a novel class of steroids which
exhibit potent antiprogestational activity.
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