Journal
TETRAHEDRON LETTERS
Volume 54, Issue 26, Pages 3321-3324Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.03.125
Keywords
Benzofuran; Eupatorium chinense; Compositae
Categories
Funding
- Program for New Century Excellent Talents in University
- Ministry of Science and Technology of China [2012ZX09103201-056, 2013BAI111305, 2013DFM30080]
- National Natural Science Foundation of China [81172947, 81202428]
- Natural Science Foundation of Guangdong Province [S2012040007825]
- Fundamental Research Funds for the Central Universities [21612203]
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Two pairs of new enantiomeric benzofurans with unusual skeletons, (+)- and (-)-eupachinin A (1), as well as (+)- and (-)-eupachinin B (2), were isolated from the roots of Eupatorium chinense by chiral HPLC. Their structures with absolute configurations were elucidated on the basis of spectroscopic methods, X-ray diffraction analysis, and quantum chemical calculation. The plausible biogenetic pathway of 1 and 2 was also proposed. (C) 2013 Elsevier Ltd. All rights reserved.
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