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

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

1, 1, 1,* , 2
 and
3
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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Abstract

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 3.0).

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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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