Citation: Km. Sam et al., N-butyl-N-methyl-11-(3 '-hydroxy-21 ',17 '-carbolactone-19 '-nor-17 'alpha-pregna-1 ',3 ',5 '(10 ')-trien-7 'alpha-yl)-undecanamide: an inhibitor of type 2 17 beta-hydroxysteroid dehydrogenase that does not have oestrogenic or androgenic activity, EUR J MED C, 35(2), 2000, pp. 217-225