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远东疣柄牛肝菌的化学成分   总被引:3,自引:0,他引:3  
从远东疣柄牛肝菌(Leccinum extremiorientale)子实体中提取分离得到13个 化合物,通过理化常数和波谱数据分析,它们的结构被鉴定为:麦角甾-7,22-二 烯-3β,5α,6β-三醇(1),麦角甾醇过氧化物(2),麦角甾醇(3),麦角甾 -4,6,8(14),22-四烯-3-酮(4),麦角甾-5,7-二烯-3β-醇(5),棕榈酸 (6),(2S,3S,4R,2’R)-2-(2’-羟基二十四碳酰胺)十八烷-1,3,4-三 醇(7),脑苷脂B(8),脑苷脂D(9),尿嘧啶(10),肌苷(11),腺苷(12 ),D-阿洛醇(13),利用2D NMR(~1H-~1H COSY,HMBC,HMQC)技术首次对化合 物8和9的氢谱和碳谱数据进行了全归属。在浓度为100 μg/mL时,化合物2,7和8 表现出选择性地抗蛇毒Crotalus adamenteus分泌的磷脂酶A_2活性,而对蜂毒 Apis mellifcra磷脂酶A_2却无活性。此外,远东疣柄牛肝菌提取物对粘虫拒食率 和小莱蛾死亡率分别为67%和55%。  相似文献   

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A new purine derivative, 3‐(3‐methylbut‐2‐en‐1‐yl)isoguanine ( 1 ), and a new cleistanthane‐type diterpenoid glucoside, 19‐hydroxyspruceanol 19‐Oβ‐D ‐glucopyranoside ( 2 ), together with eight known compounds were isolated from the whole plant of Phyllanthus reticulatus. The structures were elucidated by chemical and spectroscopic methods.  相似文献   

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Chemical Constituents of Anabasis salsa   总被引:1,自引:0,他引:1  
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Hasan  A.  Lu  C. F.  Nijat  D.  Aisa  H. A. 《Chemistry of Natural Compounds》2021,57(2):353-354
Chemistry of Natural Compounds -  相似文献   

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The two new triterpenoids, (5β,8α,9β,10α,13α,14β)‐5,9,13‐trimethyl‐4‐oxo‐3,24,25,26‐tetranor‐2,3‐secooleanane‐2,29‐dioic acid (=4‐oxo‐D:A‐friedo‐3‐nor‐2,3‐secooleanane‐2,29‐dioic acid; 1 ) and (2α,3β,4β,5β,8α,9tlsb=‐2%>β,10α,13α,14β,24R)‐3,24‐epoxy‐24‐ethoxy‐2‐hydroxy‐5,9,13‐trimethyl‐24,25,26‐trinoroleanan‐29‐oic acid (=3β,24‐ epoxy‐24α‐ethoxy‐2α‐hydroxy‐D:A‐friedooleanan‐29‐oic acid; 2 ) (absolute configurations tentative), together with a novel bi‐2H‐benzopyran, namely (rel‐(3R,3′S,4R,4′S)‐3,3′,4,4′‐tetrahydro‐6,6′‐dimethoxy[3,3′‐bi‐2H‐benzopyran]‐4,4′‐diol ( 3 ), were isolated from Tripterygium wilfordii Hook . f. Their structures were established by chemical and spectroscopic studies and by X‐ray crystallography.  相似文献   

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