Nine triterpenoids (neoabiestrines A-I, 1-9) including six rearranged lanostanes (1-6) and a rare cycloart-7-ene (7) were isolated from Abies recurvata together with ten known compounds. Their structures were determined by detailed analysis of NMR and MS spectroscopic data. The absolute configurations of 1 and 8 were determined by Cu-Ka X-ray crystallography. Compound 6 showed potent anti-proliferative effect against THP-1 tumor cells with an IC(50) value of 17.8 μg/mL.
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| http://dx.doi.org/10.1016/j.phytochem.2012.05.032 | DOI Listing |
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