13,17-Secoandrost-4-en-17-oic acid, 13-hydroxy-3-oxo-, .delta.-lactone 17a-Oxa-D-homoandrost-4-ene-3,17-dione 4416-57-3 D-Homo-17a-oxaandrost-4-ene-3,17-dione NSC12173 TLL Testololactone