A new prenylated aurone from Artocarpus altilis

Abstract

Phytochemical study of the methanol extract of Artocarpus altilis resulted in the isolation of a new prenylated aurone, artocarpaurone (1), together with eight known compounds including two prenylated chalcones (2 and 3), three prenylated flavanones (4–6), and three triterpenes (7–9). The structure of 1 was elucidated as 6-hydroxy-2-[8-hydroxy-2-methyl-2-(4-methyl-3-pentenyl)-2H-1-benzopyran-5-ylmethylene]-3(2H)-benzofuranone by spectroscopic methods including 1D and 2D NMR spectra and FT-ICR-MS. Compound 1 showed moderate nitric oxide radical scavenging activity, whereas 2 and 3 had moderate 2,2-diphenyl-1-picrylhydrazyl radical scavenging effect, compared with the positive control (+)-catechin.

Keywords:

• Artocarpus altilis
• Moraceae
• prenylated aurone
• artocarpaurone
• antioxidant

Acknowledgments

This study was financially supported by Vietnam Ministry of Science and Technology and National Foundation for Science and Technology Development (NAFOSTED-104.01.110.09, Tran Thu Huong). The authors are grateful to Dr Tran Huy Thai, Institute of Ecology and Biological Resources, VAST for the plant identification.