Abstract
Sarglafuran A (1), a new [4 + 2] type lindenane sesquiterpene dimer with an unique furan ring moiety, and a pair of new [2 + 2] type dimeric lindenane epimers, sarglalactones N and O (2 and 3), were isolated from the leaves of Sarcandra glabra. Their structures were elucidated by comprehensive spectroscopic analyses, and the absolute configurations of these compounds were determined by single crystal X-ray diffraction or CD exciton chirality method. In addition, a possible biosynthetic pathway of the unique furan ring moiety in 1 had been proposed. Their cytotoxicity against MCF-7 and MDA-MB-231, together with the inhibitory activity against nitric oxide (NO) production of LPS-induced RAW264.7 macrophages were evaluated.
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