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(R)-1-((2R,3aS,5R,5'R,6S,6''S,7aS)-2-(((tert-butyldiphenylsilyl)oxy)methyl)-6-methyl-2,3,3a,3',4',5'',6,6'',7,7a-decahydrodispiro[furo[3,2-b]pyran-5,2'-furan-5',2''-pyran]-6''-yl)allyl acetate
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((2R,3aS,5S,5'R,6S,6''S,7aS)-2-(((tert-butyldiphenylsilyl)oxy)methyl)-6-methyldecahydro-4''H-trispiro[furo[3,2-b]pyran-5,2'-furan-5',2''-pyran-3'',2'''-[1,3]dithian]-6''-yl)methyl pivalate
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((2R,3aS,5R,5'R,6S,6''S,7aS)-2-(((tert-butyldiphenylsilyl)oxy)methyl)-6-methyl-3''-(((trifluoromethyl)sulfonyl)oxy)-2,3,3a,3',4',5'',6,6'',7,7a-decahydrodispiro[furo[3,2-b]pyran-5,2'-furan-5',2''-pyran]-6''-yl)methyl benzoate