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Two racemic pairs of stereoisomers of the title compound, C17H22O8, were characterized by single-crystal X-ray analysis. Compound (Ia) has an r-1,2-cis, 3-trans configuration, while (Ib) has an r-1,2-cis, 3-cis configuration. The five-membered tetrahydrofuran rings of both isomers adopt envelope conformations with the substituted β-C atom as the flap.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks Ia, Ib, default

fcf

Structure factor file (CIF format)
Contains datablock I~a~

fcf

Structure factor file (CIF format)
Contains datablock I~b~,

CCDC references: 128949; 128950

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