1-Oxa-6-azaspiro[4.5]decane-6-carboxylic acid,8,10-dimethyl-2-[(1R,3R)-3-methyl-5-[(phenylmethoxy)methyl]-1-[[tris(1-methylethyl)silyl]oxy]-5-hexen-1-yl]-3-[(2S)-3,3,3-trifluoro-2-methoxy-1-oxo-2-phenylpropoxy]-, 2-(trimethylsilyl)ethyl ester, (2S,3R,8R,1