Several esters of norethisterone (17 alpha-ethynyl-17 beta-hydroxyestr-4-en-3-one) with carboxylic acids containing a cyclopropyl or cyclobutyl ring have been synthesized and the stereochemistries of the side-chains determined.
Chan, L. K. M.; Gemmell, P. A.; Gray, G. W., Molecular Crystals and Liquid Crystals (1969-1991), 1989, vol. 168, p. 229 - 246
作者:Chan, L. K. M.、Gemmell, P. A.、Gray, G. W.、Lacey, D.、Toyne, K. J.