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Guttiferic acid, a novel rearrangement product from minor chromenoxanthone pigments of Garcinia morella Desr.

Rajagopal Rao, D. and Gurudutt, K. N. and Mamatha, S. and Jagan Mohan Rao, L. (2007) Guttiferic acid, a novel rearrangement product from minor chromenoxanthone pigments of Garcinia morella Desr. Magnetic resonance in chemistry : MRC, 45 (7). pp. 578-82. ISSN 0749-1581

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Abstract

Morellic and isomorellic acids (2 and 3), present in the seed coat as well as resinous exudate of Garcinia morella Desr., are geometric isomers and structurally related to morellin (1), the major chromenoxanthone pigment. Both form crystalline complexes with pyridine and afford guttiferic acid (7), a novel skeletal rearrangement product, when heated with mild alkali. Structure of the latter has been deduced mainly by a comparative study of 1H and 13C NMR spectra of methyl morellate (5), methyl-O-methyl morellate (6), guttiferic acid (7) and dimethyl guttiferate (8).

Item Type: Article
Uncontrolled Keywords: NMR; 1HNMR; 13C NMR; 2D NMR; Garcinia morella; chromenoxanthone; morellic and isomorellic acids; guttiferic acid
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 02 Alkaloids Chemistry
500 Natural Sciences and Mathematics > 10 Plants
Divisions: Food Safety Analytical Quality Control Lab
Plantation Products Spices and Flavour Technology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 12 Aug 2008 10:34
Last Modified: 23 May 2012 07:14
URI: http://ir.cftri.com/id/eprint/1862

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