Structure of gmelanone—a novel lignan with the 3,6-dioxabicyclo[3,2,1]octane skeleton

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Abstract
Gmelanone, a lignan from Gmelina arborea is shown to have a rearranged carbon skeleton relative to other known lignans; it is the first reported example of a lignan derived from 3,6-dioxabicyclo[3,2,1]octane.