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A new 3,3''-biflavanone, sikokianin D (1), was isolated from the roots of Wikstroemia indica, together with two known compounds. Their structures were elucidated by chemical evidence and spectral analyses, including HR-ESI-MS, and 1D- and 2D-NMR techniques.

Sikokianin D, A New C-3/C-3"-Biflavanone from the Roots of Wikstroemia indica