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학술저널
저자정보
Begum, Rokeya (Department of Applied Chemistry and Chemical Technology, Faculty of Engineering and Technology, University of Dhaka) Rahman, Mohammad S (Department of Applied Chemistry and Chemical Technology, Faculty of Engineering and Technology, University of Dhaka) Chowdhury, A M Sarwaruddin (Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka) Hasan, Choudhury M (Department of Applied Chemistry and Chemical Technology, Faculty of Engineering and Technology, University of Dhaka) Rashid, Mohammad A (Department of Applied Chemistry and Chemical Technology, Faculty of Engineering and Technology, University of Dhaka)
저널정보
경희한의학연구센터 Oriental pharmacy and experimental medicine Oriental pharmacy and experimental medicine 제9권 제2호
발행연도
2009.1
수록면
200 - 205 (6page)

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The n-hexane and carbon tetrachloride soluble fractions of a methanolic extract of the stem bark of the Couroupita guianensis furnished three compounds, identified as $\beta$-amyrin (1), betulin-$3{\beta}$-caffeate (2) and lupeol-$3{\beta}$-caffeate (3). The structures of the isolated compounds were deduced by extensive spectroscopic analysis as well as by comparison with published values. Compounds 1-3 were subjected to antioxidant screening through free radical scavenging activity by DPPH (1,1-diphenyl-2-picrylhydrazyl), where compound 2 showed moderate antioxidant activity with $IC_{50}$ value $108.0{\mu}g/ml$.

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