Novel Nortriterpenoids from Aphanamixis grandifolia
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概要
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Four novel nortriterpenoids, 24,25-epoxy-tirucall-7,20(E)-diene-3,23-dione (1), 24,25,26,27-tetranortirucall-1,7-diene-23(21)-lactone (2), 3α-hydroxy-tirucall-7-ene-20-one (3), and 3-oxo-tirucall-7-ene-3,20-dione (4), together with one known compound mombasol (5) were isolated from the stem barks of Aphanamixis grandifolia. Their structures were elucidated on the basis of various spectroscopic analysis including electrospray ionization (ESI)-MS, high resolution (HR)-ESI-MS, IR, 1D- and 2D-NMR techniques (heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond connectivity (HMBC) and rotating frame Overhauser enhancement spectroscopy (ROESY)), and by comparison of their spectral data with those reported. The absolute configuration of compound 1 was determined by circular dichroism (CD) exciton chirality.
著者
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Kong Ling-Yi
Department of Natural Medicinal Chemistry, China Pharmaceutical University
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Luo Jian-guang
Dep. Of Natural Medicinal Chemistry China Pharmaceutical Univ.
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Zhang Yao
Department of Natural Medicinal Chemistry, China Pharmaceutical University
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Wang Jun-Song
Department of Natural Medicinal Chemistry, China Pharmaceutical University
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Luo Jun
Department of Natural Medicinal Chemistry, China Pharmaceutical University
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Zhang Yao
Department Of Computer Science & Technology Tsinghua University
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Luo Jun
Department Of Electronic Engineering Shanghai Jiaotong University
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Kong Ling-yi
Department Of Natural Medicinal Chemistry China Pharmaceutical University
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