Journal
ORGANIC LETTERS
Volume 8, Issue 5, Pages 991-994Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol060062f
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Rubriflordilactones A (1) and B (2), two novel highly unsaturated rearranged bisnortriterpenoids possessing a biosynthetically modified aromatic D-ring, were isolated from the leaves and stems of Schisandra rubriflora. Their structures were established on the basis of extensive spectroscopic methods, including two-dimensional NMR techniques, and confirmed by X-ray crystallographic analysis. Compound 1 showed weak anti-HIV-1 activity, and compound 2 exhibited an EC50 value of 9.75 mu g/mL (SI = 12.39) against HIV-1 replication with low cytotoxicity.
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