Triterpenoids from Dysoxylum malabaricum.
Two triterpenes 21R,23R-epoxy-21alpha-ethoxy-24S,25-dihydroxyapotirucall-7-en-3-one and 24R-acetoxy-3beta,25-dihydroxycycloartane were isolated from the leaves of Dysoxylum malabaricum together with eight known compounds lupeone, lupeol. sitosterol, dipterocarpol, cycloart-25-ene-3beta,24-diol, 24R,25-dihydroxycycloartan-3-one, 3beta,24R,25-trihydroxycycloartane and ergosta-5,24(24(1))-diene-3beta,4beta,20S-triol. The complete 1H and 13C NMR spectral assignment of the new apotirucallene triterpenoid has been achieved by 1H-1H COSY, HMQC and HMBC experiments.
Department of Chemistry, College of Science, Sultan Qaboos University, Al-khode, Oman. hisham@squ.edu.om
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A
Hisham
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Bai
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JayaKumar
M S
MS
Nair
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Fujimoto
D007194:India; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D013261:Sterols; D014315:Triterpenes