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New Limonoids and a Dihydrobenzofuran Norlignan from the Roots of Toona sinensis
Key Laboratory of Tea Biochemistry and Biotechnology, School of Tea and Food Technology, Anhui Agricultural University, Hefei 230036, China
Research Center on Entomogenous Fungi, School of Forestry, Anhui Agricultural University, Hefei 230036, Anhui, China
Department of Natural Products Chemistry, Shanghai Institute of Material Medica, Shanghai 201203, China
* Author to whom correspondence should be addressed.
Received: 24 December 2012; in revised form: 28 January 2013 / Accepted: 30 January 2013 / Published: 1 March 2013
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, 6–13 from this plant is reported here for the first time.
Keywords: Meliaceae; Toona sinensis; limonoids; DPPH free radical scavenging
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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.
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(3):2840-2850.
Dong, Xiao-Jie; Zhu, Yun-Fei; Bao, Guan-Hu; Hu, Feng-Lin; Qin, Guo-Wei. 2013. "New Limonoids and a Dihydrobenzofuran Norlignan from the Roots of Toona sinensis." Molecules 18, no. 3: 2840-2850.