(2R)-2α-(4-Methoxyphenyl)-7,8-dimethoxy-3,4-dihydro-2H-1-benzopyran-3α,4α-diol;(2R)-3,4-Dihydro-7,8-dimethoxy-2α-(4-methoxyphenyl)-2H-1-benzopyran-3α,4α-diol
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