The molecule is a steroid lactone and a 3-oxo-Delta(4) steroid. It has a role as a contraceptive drug, an aldosterone antagonist and a progestin.
(1R,2R,4R,10R,11S,14S,15S,16S,18S,19S)-10,14-dimethylspiro[hexacyclo[9.8.0.02,4.05,10.014,19.016,18]nonadec-5-ene-15,5'-oxolane]-2',7-dione