(1S,3'R,4'S,5'R,6'R)-4',5'-bis((tert-butyldimethylsilyl)oxy)-6'-(hydroxymethyl)-5,7-dimethoxy-3',4',5',6'-tetrahydro-3H-spiro[isobenzofuran-1,2'-pyran]-3'-ol

((1S,3'R,4'S,5'R,6'R)-4',5'-bis((tert-butyldimethylsilyl)oxy)-3'-hydroxy-5,7-dimethoxy-3',4',5',6'-tetrahydro-3H-spiro[isobenzofuran-1,2'-pyran]-6'-yl)methyl pivalate

((1S,3'S,4'R,5'R,6'R)-4',5'-bis((tert-butyldimethylsilyl)oxy)-3'-hydroxy-5,7-dimethoxy-3',4',5',6'-tetrahydro-3H-spiro[isobenzofuran-1,2'-pyran]-6'-yl)methyl pivalate

((1S,4'S,5'R,6'R)-4',5'-bis((tert-butyldimethylsilyl)oxy)-5,7-dimethoxy-3'-oxo-3',4',5',6'-tetrahydro-3H-spiro[isobenzofuran-1,2'-pyran]-6'-yl)methyl pivalate