期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 84, 期 7, 页码 4473-4477出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.8b03284
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资金
- National Natural Science Foundation of China [21778027]
Heliaquanoid A (1), the first exo-2,4-linked Diels-Alder adduct between a pseudoguaianolide dienophile and a guaianolide diene, and heliaquanoids B-E (2-5), four new 2,4-linked Diels-Alder adducts between a xanthanolide dienophile and a guaianolide diene, were isolated from stems and leaves of Inula helianthus-aquatica. Their structures were determined by NMR spectroscopy, a modified Mosher's method, electronic circular dichroism, and X-ray diffraction analysis. Compounds 2 and 3 exhibited moderate cytotoxic activities against HL-60 cells with IC50 values of 7.5 and 4.9 mu M, respectively.
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