Methanesulfonic acid, trifluoro-,(1Z)-1-[(1R,4R,5R,6R,7R)-5-[(2S)-2-cyano-2-hydroxyethyl]-7-ethenyl-6-(6E)-6-octenyl-3-oxo-7-[(triethylsilyl)oxy]bicyclo[2.2.1]hept-2-ylidene]-3-[[(1,1-dimethylethyl)diphenylsilyl]oxy]propyl ester, rel-