The set of four racemic 5,7,3′,4′-tetramethoxyflavan-3-ols is completed by synthesis of the 2,3-trans-3,4-cis-isomer, and n.m.r. data for all four racemates are tabulated.
M. I. Baig, J. W. Clark-Lewis, R. W. Jemison and M. J. Thompson, J. Chem. Soc. D, 1969, 820 DOI: 10.1039/C29690000820
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