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《Chinese Journal of Natural Medicines》 2007-04
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Non-alkaline Constituents From the Leaf of Alstonia scholaris

DU Guo-Shun1,2, CAI Xiang-Hai1, SHANG Jian-Hua3, LUO Xiao-Dong1 1 State Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650204; 2 Graduate School of Chinese Academy of Sciences, Beijing, 100039; 3 Yunnan Institute of Materia Medica, Kunming, 650111, China  
AIM: To isolate the non-alkaline constituents from the leaves of Alstonia scholaris; METHODS: All compounds were isolated by silica gel, RP-18 or Sephadex LH-20 column chromatographic method. The structures were determined on the basis of 1D, 2D NMR and MS experiments. RESULTS: Fourteen compounds were obtained and the structures were elucidated as: cycloeucalenol (1), α-amyrin acetate(2), β-amyrin-3-palmitate (3), 20 (29)-lupen-3-ol(4), 20(29)-lupen-3-palmitate (5), β-sitosterol (6), squalene (7), α-tocopherol (8), α-tocopherolquinone (9), bis(2-ethylhexyl) phthalate (10), dibutyl phthalate (11), 1-hydoxy-3,5-dimethoxyxanthone (12),7, 3′, 4′-trimethoxyl-5-hydoxylflavone (13), 3, 5, 7, 4′-tetrahydoxyl-flavone-3-O-β-D-glucoside (14). CONCLUSION: Compounds 3, 5, 7~13 have been obtained for the first time from this species.
【Fund】: 云南省自然科学基金重点项目2004C0009Z~~
【CateGory Index】: R284.1
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