(5ar,5bs,7as,8r,10as,10br)-8-acetyl-1,1,1a-trifluoro-5a,7a-dimethyl-9-methylidene-3-oxo-1,1a,3,4,5,5a,5b,6,7,7a,8,9,10,10a,10b,10c-hexadecahydrocyclopenta[a]cyclopropa[l]phenanthren-8-yl acetate