Synonyms: 2-Oxaestra-4,9,11-trien-3-one,17-[(cyclohexylacetyl)oxy]-, (17b)-;Cyclopenta[5,6]naphtho[1,2-c]pyran, 2-oxaestra-4,9,11-trien-3-one deriv.;Cyclohexaneacetic acid,2,4,6a,7,8,9,9a,9b,10,11-decahydro-6a-methyl-2-oxocyclopenta[5,6]naphtho[1,2-c]pyran-7-ylester, [6aS-(6aa,7a,9ab,9ba)]-; RU 5077