Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 18, Issue 41, Pages 8424-8432Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ob01934h
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Funding
- Drug Innovation Major Project [2018ZX09711001-008]
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Eight new geranylquinol derivatives (1-8) were purified from the roots of Arnebia euchroma. Compounds 1-6 possess an unprecedented dearomatic benzocogeijerene skeleton with a rare trans-fused hydronaphthalene moiety. Their structures and absolute configurations were elucidated by HRESIMS, NMR, ECD, and X-ray diffraction. A convenient strategy for rapid determination of the relative configuration of H-1/H-7/Me-16 and the absolute configuration at C-1 for 1-6 was summarized. Compound 2 exhibited cytotoxicity against all the tested cell lines, namely PC9, BGC823, HCT116, HepG2, HeLa, and U87-MG, with IC50 values ranging from 13.7 to 29.3 mu M.
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