(2’R,6S,8S,9R,10S,11S,13S,14S,16S)-4′-chloro-5′-ethyl-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3’H-spiro[cyclopenta[a]phenanthrene-17,2′-furan]-3,3′(6H)-dione