3-methoxy-8,14-seco-6-oxaestra-1,3,5(10),8-tetraen-7,14,17-trione

14β-3-methoxy-6-oxaestra-1,3,5(10),8,15-pentaen-7,17-dione

3-methoxy-6-oxaestra-1,3,5(10),8,14-pentaen-7-oxo-17-ethylene acetal

14β-3-methoxy-16-bromo-6-oxaestra-1,3,5(10),8-tetraen-7,17-dione