Journal
ORGANIC LETTERS
Volume 18, Issue 16, Pages 4004-4007Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b01817
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Funding
- Program for the National Natural Science Foundation of China [U1401225, 81573307]
- Ministry of Science and Technology of China [2013BAI11B05, 2013DFM30080, 2012ZX09103201-056]
- Guangdong Natural Science Foundation for Distinguished Young Scholars [2015A030306022]
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Five sesquiterpene-based meroterpenoids with three kinds of new skeletons [1, 2, 3, (+)-4, and (-)-4] were isolated from the leaves of Myrtus communis. Compound 1 featured a new carbon skeleton with an unprecedented octahydrospiro [bicyclo [7.2.0]undecane-2,2'-chromene] tetra-cyclic ring system, which possessed two preferred conformations detected by variable-temperature NMR spectroscopy experiments. In addition, the structure of reported myrtucommulone K was revised to be compound 3. The plausible biosynthetic pathways of these meroterpenoids and their cytotoxicities are discussed.
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