2',3 alpha'-tetrahydrofuran-2'-spiro-17-(6 alpha,7 alpha-difluoromethylene-1 alpha,2 alpha-methylene)-4-androsten-3-one
2',3 alpha'-tetrahydrofuran-2'-spiro-17-(6 alpha,7 alpha-difluoromethylene-1 alpha,2 alpha-methylene)-4-androsten-3-one