Govindachari, T. R. ; Parthasarathy, P. C. ; Pai, B. R. ; Subramaniam, P. S. (1965) Chemical investigation of Andrographis wightiana : isolation and structure of wightin, a new flavone Tetrahedron, 21 (11). pp. 3237-3245. ISSN 0040-4020
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00404...
Related URL: http://dx.doi.org/10.1016/S0040-4020(01)96942-X
Abstract
The isolation of two new flavones, wightin and echioidinin, from Andrographis wightiana Arn. ex. Nees is reported. By a combination of spectral, degradative and synthetic evidence, wightin is shown to be 5,3'-dihydroxy-7,8,2'-trimethoxyflavone. Wightin appears to be the first example of a naturally occurring flavone with an unique 2',3'-oxygenation pattern instead of the normal 3', 4'-pattern.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 15089 |
| Deposited On: | 13 Nov 2010 06:49 |
| Last Modified: | 02 Jun 2011 04:53 |
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