methyl (3S,4S,5S,6S)-5-(benzyloxy)-2-bromo-6-((2S,3S,6S)-6-((R)-1-((tert-butyldiphenylsilyl)oxy)propan-2-yl)-3-methyltetrahydro-2H-pyran-2-yl)-3-hydroxy-2,4-dimethylheptanoate