Shafiee A, Vossoghi M, Francisco C G, Freire R, Hernandez R, Salazar J A, Suarez E, Sotheeswaran S
Steroids. 1983 Mar;41(3):285-90. doi: 10.1016/0039-128x(83)90099-5.
The chemical synthesis and physical data of several new esters of norethisterone (17 alpha-ethynyl-17 beta-hydroxyestr-4-en-3-one) are reported, which contain either a chloro- or an alkoxy-group as a substituent in the acid side-chain.