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. 2003 Apr;66(4):572-4.
doi: 10.1021/np0205248.

Absolute configuration and complete assignment of 13C NMR data for new sesquiterpenes from Maytenus chiapensis

Marvin J Núñez  1 , Fernando Cortés-Selva, Isabel L Bazzocchi, Ignacio A Jiménez, Antonio G González, Angel G Ravelo, José A Gavin
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Absolute configuration and complete assignment of 13C NMR data for new sesquiterpenes from Maytenus chiapensis

Marvin J Núñez et al. J Nat Prod. 2003 Apr.

Abstract

Five new dihydro-beta-agarofuran sesquiterpenes (1-5) were isolated from the leaves of Maytenus chiapensis. The structures of 1-5 were determined by means of 1D and 2D NMR techniques. A semiselective HMBC technique was applied in order to obtain complete (13)C NMR assignments. Absolute configurations were determined by CD studies and chemical correlations and on biogenetic grounds. Compound 4 showed weak activity against a multidrug-resistant Leishmania tropica line.

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