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Molecules 2013, 18(6), 6573-6583; doi:10.3390/molecules18066573
Article

New Lignans from the Leaves and Stems of Kadsura philippinensis

1,2
,
1,3
,
1
,
1
,
4
,
5
,
6
 and
1,*
Received: 13 May 2013 / Revised: 29 May 2013 / Accepted: 30 May 2013 / Published: 4 June 2013
(This article belongs to the Section Metabolites)
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Abstract

Three novel C19 homolignans, taiwankadsurins D (1), E (2) and F (4), and two new C18 lignans kadsuphilins N (3) and O (5) were isolated from the aerial parts of Taiwanese medicinal plant Kadsura philippinensis. The structures of compounds 15 were determined by spectroscopic analyses, especially 2D NMR techniques. The structure of compound 5 was further confirmed by X-ray crystallographic analysis. Compounds 1 and 2 have a 3,4-{1'-[(Z)-2''-methoxy-2''-oxoethylidene]}-pentano(2,3-dihydrobenzo[b]furano)-3-(2'''-methoxycarbonyl-2'''-hydroxy-2''',3'-epoxide) skeleton.
Keywords: Kadsura philippinensis; taiwankadsurins; lignans Kadsura philippinensis; taiwankadsurins; lignans
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lin, Y.-C.; Cheng, Y.-B.; Liaw, C.-C.; Lo, I.-W.; Kuo, Y.-H.; Chiang, M.Y.; Chou, C.-H.; Shen, Y.-C. New Lignans from the Leaves and Stems of Kadsura philippinensis. Molecules 2013, 18, 6573-6583.

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