Abstract
Diastereoisomers of 3,17 beta-dihydroxy-20,21-epoxy-19-norpregna-1,3,5(10)-triene have been prepared as potential antitumor agents. Both isomers undergo the base-catalyzed Payne rearrangement. The isomers were cytotoxic to mammalian cells in culture and were able to displace [3H]estradiol from binding sites in rat uterine cytosols with 1/7 and 1/70 the potency of estradiol. The reasons for this difference are discussed.
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