1-[(1R,2R,10bR)-10b-fluoro-1,11-dihydroxy-2,10a,12a-trimethyl-1,2,3,3a,3b,4,5,7,10,10a,10b,11,12,12a-tetradecahydrocyclopenta[5,6]naphtho[1,2-f]indazol-1-yl]-2-hydroxyethanone