2-[(1R,2S,10S,11S,14R,15S,17S)-1-fluoro-14,17-dihydroxy-2,15-dimethyl-5-oxotetracyclo[8.7.0.0?,?.0??,??]heptadec-6-en-14-yl]-2-oxoethyl acetate
2-[(1R,2S,10S,11S,14R,15S,17S)-1-fluoro-14,17-dihydroxy-2,15-dimethyl-5-oxotetracyclo[8.7.0.02,7.011,15]heptadec-6-en-14-yl]-2-oxoethyl acetate