(2S,5R,7S,9S,10S,12R)-2-((2R,5R,6S)-5-Ethyl-6-methyl-5-triethylsilanyloxy-tetrahydro-pyran-2-yl)-2,10,12-trimethyl-9-((S)-1-triethylsilanyloxymethyl-propyl)-1,6,8-trioxa-dispiro[4.1.5.3]pentadec-13-en-15-one

(S)-2-[(2S,3S,5R)-6-Methoxy-6-(3-methoxy-prop-1-ynyl)-3,5-dimethyl-tetrahydro-pyran-2-yl]-butan-1-ol