(3aS,3bR,3cR,4S,5aS,6R,7S,8aS,8bS,10aR)-3c-fluoro-4-hydroxy-6-(2-hydroxyacetyl)-3b,5a,7-trimethyl-3-oxo-3,3a,3b,3c,4,5,5a,6,7,8,8a,8b,9,10-tetradecahydrocyclopenta[2,3]cyclopropa[1,2-a]cyclopenta[f]naphthalen-6-yl pentanoate