摘要
研究植物莲Nelumbo nucifera干燥叶的化学成分,为进一步开发利用荷叶提供依据。分离得到27个化合物,分别为10-二十八烷醇(1)、β-谷甾醇(2)、1-十一烷醇(3)、1-二十烷醇(4)、胡萝卜苷(5)、6'-hydroxy-4,4'-dimethoxychalcone(6)、1-羟基-3,7,8-三甲氧基酮(7)、鼠李素-3-O-β-D-吡喃葡萄糖苷(8)、chrysoeriol-7-O-β-D-glucoside(9)、槲皮素-3-O-β-D-吡喃葡萄糖苷(10)、槲皮素-3-O-α-L-吡喃鼠李糖苷(11)、金丝桃苷(12)、槲皮素-3-O-芸香糖苷(13)、紫云英苷(14)、异鼠李素-3-O-α-L-鼠李糖-(1→6)-[α-D-来苏糖-(1→2)-β-D-葡萄糖苷](15)、异鼠李素-3-O-α-D-来苏糖-(1→2)-β-D-葡萄糖苷(16)、异鼠李素-3-O-β-D-葡萄糖苷(17)、异鼠李素-3-O-α-L-鼠李糖-(1→6)-β-D-葡萄糖苷(18)、槲皮素(19)、山柰酚(20)、去氢荷叶碱(21)、莲碱(22)、stigmast-7-en-3-O-β-D-glucopyranoside(23)、stigmast-7-en-3β-ol(24)、邻二羟基苯(25)、alangionoside L(26)、icariside B2(27)。化合物1,6~8,24,25为首次从该植物中分离得到,化合物15~18为首次从荷叶中分离得到。经体外活性筛选,发现化合物6,8,10,11,13,15对体外淀粉样蛋白(β-amyloid,Aβ)具抑制活性,抑制率分别为(63.99±24.29)%,(79.61±4.49)%,(49.96±12.61)%,(101.19±8.19)%,(88.41±6.76)%,(72.48±8.97)%,其中有5个化合物为黄酮类化合物。
To study the chemical constituents, twenty-seven compounds were isolated from the 70% ethanol extract from leaves of Nelumbo nucifera by modern chromatographic techniques. Their structures were identified as 10-octacosanol (1),/3-sitosterol (2), 1 -undecanol ( 3 ) , 1 -eicosanol (4) , daucosterol ( 5 ) , 6'-hydroxy-4,4 '-dimethoxychalcone ( 6 ) , 3,7,8-trimethoxy-1 -hydroxy-xanthone (7) , rhamnetin-3-O-β-D-glucopyranoside (8) , chrysoeriol-7-O-β-D-glucoside (9) , quercetin-3-O-β-D-glucopyranoside (10) , quer- cetin-3-O-α-L-rhamnopyranosyl ( 11 ), hyperoside ( 12 ), quercetin-3-O-rutinoside ( 13 ), astragalin ( 14 ) , isorhamnetin-3-O-α-L-rh- amnopyranosyl- ( 1 →6 ) - α-D-lyxopyranosyl- ( 1 →2 ) -β-D-glucopyranoside ( 15 ), isorhamnetin-3-O-α-D-lyxopyranosyl- ( 1 →2 ) -β-D- glucopyranoside ( 16 ), isorhamnetin-3-O-β-D-glucopyranoside ( 17 ), isorhamnetin-3-O-α-L-rhamnopyranosyl-( 1 →6 ) -β-D-glucopyr- anoside ( 18 ), quercetin ( 19 ), kaempferol ( 20 ), dehydronuciferine ( 21 ), roemerine ( 22 ), stigmast-7-en-3-O-β-D-glucopyranoside (23), stigmast-7-en-3β-ol (24), and benzene-1,2-diol (25) on the basis of spectral data analysis. Compounds 1, 6, 7, 8, 24 and 25 were isolated from this plant for the first time, and compounds 15-18 were isolated from the leaves for the first time. Compounds 6, 8, 10, 11, 13 and 15 showed inhibitory activities against beta amyloid (1-42) by A-beta aggregation method with inhibition rates of (63.99 ±24.29)%, (79.61 ±4.49)%, (49.96±12.61)%, (101.19±8.19)%, (88.41 ±6.76)% and (72.48 ±8.97)%, respeetively.
出处
《中国中药杂志》
CAS
CSCD
北大核心
2013年第5期703-708,共6页
China Journal of Chinese Materia Medica
基金
国家"重大新药创制"科技重大专项(2009zx09301)
中国中医科学院自主选题研究项目(zz2012006)