Edogestrone
Edogestrone ( , ) ( developmental code name PH-218 ) , or edogesterone , also known as 17α-acetoxy-3 , 3-ethylenedioxy-6-methylpregn-5-en-20-one , is a steroidal progestin and antiandrogen of the 17α-hydroxyprogesterone group which was synthesized in 1964 but was never marketed . 
<triplet> 17α-hydroxyprogesterone <subj> steroid <obj> instance of