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Molecules 2013, 18(3), 2840-2850; doi:10.3390/molecules18032840

New Limonoids and a Dihydrobenzofuran Norlignan from the Roots of Toona sinensis

1, 1, 1,* , 2
1 Key Laboratory of Tea Biochemistry and Biotechnology, School of Tea and Food Technology, Anhui Agricultural University, Hefei 230036, China 2 Research Center on Entomogenous Fungi, School of Forestry, Anhui Agricultural University, Hefei 230036, Anhui, China 3 Department of Natural Products Chemistry, Shanghai Institute of Material Medica, Shanghai 201203, China
* Author to whom correspondence should be addressed.
Received: 24 December 2012 / Revised: 28 January 2013 / Accepted: 30 January 2013 / Published: 1 March 2013
(This article belongs to the Section Natural Products)
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Two new limonoids, toonins A (1) and B (2), and one new dihydrobenzofuran norlignan, toonin C (3), were isolated from the roots of Toona sinensis together with the ten known compounds 4-methoxy-6-(2′,4′-dihydroxy-6′-methylphenyl)-pyran-2-one (4), bourjotinolone A (5), proceranone (6), matairesinol (7), 4-hydroxy-3-methoxybenzene-ethanol (8), syringic acid (9), isoscopoletin (10), lyoniresinol (11), aloeemodin (12), and β-sitosterol (13). Their structures were elucidated on the basis of one- and two-dimensional spectroscopic analysis. Isolation of compounds 4, 613 from this plant is reported here for the first time.
Keywords: Meliaceae; Toona sinensis; limonoids; DPPH free radical scavenging Meliaceae; Toona sinensis; limonoids; DPPH free radical scavenging
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Dong, X.-J.; Zhu, Y.-F.; Bao, G.-H.; Hu, F.-L.; Qin, G.-W. New Limonoids and a Dihydrobenzofuran Norlignan from the Roots of Toona sinensis. Molecules 2013, 18, 2840-2850.

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