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Isolation and identification of a new benzofuranone derivative from Usnea longissima
Laxinamujila Bai1, Hai Ying Bao, Tolgor Bau
1a Institute of Mycology, Engineering Research Centre of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University , Xincheng Street No. 2888, Changchun , Jilin 130118 , P.R. China.
Abstract:
A new benzofuranone derivative, ethyl 2-(3,3-bis(7-acetyl-4,6-dihydroxy-3,5-dimethylbenzofuran-2-yl)acryloyl) (1), together with seven known compounds (2-8), was isolated from Usnea longissima. Their structures were elucidated by using spectroscopic methods, including 1D and 2D NMR experiments, UV, IR, EI-MS and HR-ESI-MS analysis.
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