Abstract
The methanol extract from the bark of Shorea roxburghii (Dipterocarpaceae, “Phayom” in Thai) was found to suppress plasma triglyceride elevation in olive oil-treated mice, and also to inhibit pancreatic lipase activity (IC50 = 31.6 μg/ml). From the extract, two new 3-acetyl-4-phenyl-3,4-dihydroisocoumarins, phayomphenols A1 (1) and A2 (2) were isolated, together with 22 known compounds. The structures of 1 and 2 were elucidated on the basis of chemical and spectroscopic evidence, including X-ray crystallographic analysis. Among the isolates, several oligostilbenoids, including (−)-hopeaphenol (3) and (+)-isohopeaphenol (4), showed inhibitory effects on plasma triglyceride elevation at a dose of 200 mg/kg p.o. and pancreatic lipase inhibitory activity (IC50 = 32.9 and 26.5 μM, respectively).
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This work was supported by High-tech Research Center Project for Private Universities: matching fund subsidy from MEXT (The Ministry of Education, Culture, Sports, Science and Technology), 2007-2011 and also supported by a Grant-in Aid for Scientific Research by JSPS (Japan Society for the Promotion of Science).
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Morikawa, T., Chaipech, S., Matsuda, H. et al. Anti-hyperlipidemic constituents from the bark of Shorea roxburghii . J Nat Med 66, 516–524 (2012). https://doi.org/10.1007/s11418-011-0619-6
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DOI: https://doi.org/10.1007/s11418-011-0619-6