(Z)-2-((6S,8S,9R,10S,11S,13S,14S,16R)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-7,8,9,11,12,13,15,16-octahydro-3H-cyclopenta[a]phenanthren-17(6H,10H,14H)-ylidene)-2-hydroxyacetaldehyde