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Complete assignments of 1H and 13C NMR data for seven arylnaphthalide lignans from Justicia procumbens

✍ Scribed by Meihua Yang; Jun Wu; Fan Cheng; Yuan Zhou

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
109 KB
Volume
44
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Three new arylnaphthalide lignans named 6′‐hydroxy justicidin A (1), 6′‐hydroxy justicidin B (2) and 6′‐hydroxy justicidin C (3) have been isolated from the whole plant of Justicia procumbens, together with four known ones, neojusticin A (4), chinensinaphthol methyl ester (5), isodiphyllin (6) and taiwanin C (7). The complete assignments of ^1^H and ^13^C NMR chemical shifts for the new lignans and the ^13^C NMR chemical shifts for the known lignans were obtained for the first time by means of 2D NMR techniques, including HSQC and HMBC. Copyright © 2006 John Wiley & Sons, Ltd.

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