Journal
ORGANIC LETTERS
Volume 20, Issue 4, Pages 991-994Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.7b03935
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Funding
- National Natural Science Foundation of China [81473138, 81573310, 81603030]
- Ministry of Science and Technology of China [2017ZX09305010]
- Medical Scientific Research Foundation of Guangdong Province [A2014212]
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Fluvirosaones A (1) and B (2), together with virosecurinine (3), were isolated from Flueggea virosa. Their structures were determined by physical, spectroscopic, and X-ray analysis and confirmed through comparison of the calculated and experimental C-13 NMR and electronic circular dichroism (ECD) data. Compounds 1 and 2 represent the first examples of a pentacyclic Securinega alkaloid containing a pentacyclic system and an alpha,beta-unsaturated ketone. Plausible biogenetic pathways of compounds 1 and 2 are proposed.
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