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A new naphthoquinone derivative was isolated from the heartwood of the teak stem. The chemical structure of this new compound, 4′,5′-dihydroxy-epiisocatalponol, was determined using 1-D and 2-D nuclear magnetic resonance experiments, vibrational circular dichroism, HRMS, and optical rotation. We showed that this new naphthoquinone derivative plays a key role in the variability of decay resistance...
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