13,17-Secoandrost-4-en-17-oic acid, 7.alpha.,13.alpha.-dihydroxy-3-oxo-, .delta.-lactone 17a-Oxa-D-homoandrost-4-ene-3,17-dione, 7.alpha.-hydroxy- 55230-47-2 7-.alpha.-hydroxy-D-homo-17a-oxa-androst-4-ene-3,17-dione