(3R,4R,5R,6R)-3-hydroxy-4,5-bis((trimethylsilyl)oxy)-6-(((trimethylsilyl)oxy)methyl)tetrahydro-2H-pyran-2-one compound with (3R,4S,5R,6R)-5-hydroxy-3,4-bis((trimethylsilyl)oxy)-6-(((trimethylsilyl)oxy)methyl)tetrahydro-2H-pyran-2-one and (3R,4S,5R,6R)-6-(hydroxymethyl)-3,4,5-tris((trimethylsilyl)oxy)tetrahydro-2H-pyran-2-one and (3R,4S,5S,6R)-4-hydroxy-3,5-bis((trimethylsilyl)oxy)-6-(((trimethylsilyl)oxy)methyl)tetrahydro-2H-pyran-2-one (1:1:1:1)