5'-(2-Hydroxy-5-hydroxymethyl-3-methoxyphenyl)-6,9-bis(hydroxymethyl)-3',4,11-trimethoxydibenzo[d,f][1,3]dioxepine-2-spiro-4'-cyclohexa-2',5'-dienone

The title compound C₃₁H₃₀O₁₁, an oxidation product of dehydrodivanillyl alcohol, contains two o,o-dihydroxybiphenyl ring systems joined together with a dioxepin ring structure.

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