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Examples of stilbenolignans involving cross-coupling of isorhapontigenin and monolignols. Gnetumonins B and C are the threo and erythro aryl-alkyl ether structures arising from 4′–O–β cross-coupling of isorhapontigenin and coniferyl alcohol; gnetofuran A and gnetucleistol F are the phenylcoumaran structures arising from the 5′–β cross-coupling of isorhapontigenin and coniferyl or sinapyl alcohol, respectively.
