19-Nor-17a-pregn-4-en-20-yn-3-one,17-hydroxy-7a-methyl-(7CI,8CI); 17a-Ethynyl-17-hydroxy-7a-methyl-4-estren-3-one; 17b-Hydroxy-17a-ethynyl-7a-methylestr-4-en-3-one; 7a-Methyl-17a-ethynyl-19-nortestosterone; 7a-Methylnorethindrone; NSC 142228;Org-OM 38; D4-Tibolone
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