(+)-Kunstlerone, a New Antioxidant Neolignan from the Leaves of Beilschmiedia kunstleri Gamble
Marc Litaudon, Mat Ropi Mukhtar, Jamaludin Mohamad and 3 more
Molecules · 2011
doi:10.3390/molecules16086582 (opens in a new tab)
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Abstract
A new neolignan, 3,4-dimethoxy-3′,4′-methylenedioxy-2,9-epoxy-6,7-cyclo-1,8-neolign-11-en-5(5H)-one, which has been named (+)-kunstlerone (1), together with six known alkaloids: (+)-norboldine (2), (+)-N-methylisococlaurine (3), (+)-cassythicine (4), (+)-laurotetanine (5), (+)-boldine (6) and (-)-pallidine (7), were isolated from the leaves of Beilschmiedia kunstleri. The structures were established through various spectroscopic methods notably 1D- and 2D-NMR, UV, IR and LCMS-IT-TOF. (+)- Kunstlerone (1) showed a strong antioxidant activity, with an SC50 of 20.0 µg/mL.
Abstract licence: CC BY
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