东北铁线莲地上部位化学成分研究

目的研究东北铁线莲Clematis manshurica地上部位的化学成分。方法采用硅胶柱色谱、ODS柱色谱和制备HPLC等技术方法进行分离纯化,运用理化性质和波谱数据鉴定化合物结构。结果从东北铁线莲地上部位乙醇提取物中分离得到17个化合物,分别鉴定为(+)-表松脂醇(1)、(+)-松脂醇(2)、(-)-表丁香树脂醇(3)、(+)-梣皮树脂醇(4)、(+)-松脂醇-4-O-β-D-吡喃葡萄糖苷(5)、(+)-丁香树脂醇-4-O-β-D-吡喃葡萄糖苷(6)、(+)-表丁香树脂醇-4-O-β-D-吡喃葡萄糖苷(7)、罗汉松脂素(8)、(+)-珍珠花环木脂素(9)、(+)-异落叶松脂素(10)、(7R,8R)-4,7,9,9′-四羟基-3,3′-二甲氧基-8-O-4′-新木脂素(11)、(7R,8S)-4,7,9,9′-四羟基-3,3′-二甲氧基-8-O-4′-新木脂素(12)、(7S,8R)-二氢脱氢双松柏醇(13)、木犀草素(14)、3″-O-(2′′′-甲基丁酰基)异当药苷(15)、2″-O-(2′′′-甲基丁酰基)异当药苷(16)、6″-O-(2′′′-甲基丁酰基)异当药苷(17)。结论所有化合物均为首次从该植物地上部位中分离得到,其中化合物1、3、4、7~9、11、12、15~17为首次从该属植物中分离得到。     

土庄绣线菊化学成分研究

目的研究土庄绣线菊Spiraea pubescens的化学成分。方法采用硅胶柱色谱、ODS柱色谱和制备HPLC等技术进行化学成分分离,根据理化性质和波谱数据鉴定化合物结构。结果从土庄绣线菊乙醇提取物中分离得到14个化合物,分别鉴定为β-谷甾醇(1)、正二十三醇(2)、4-豆甾烯-3-酮(3)、正二十五醇(4)、豆甾烷醇(5)、(+)-环橄榄素(6)、(+)-africannal(7)、(+)-南烛木树脂酚(8)、5-甲氧基-(+)-异落叶松脂素(9)、(+)-异落叶松脂素(10)、(7R,8R)-4,7,9,9′-四羟基-3,3′-二甲氧基-8-O-4′-新木脂素(11)、(6S,9R)-6-羟基-3-酮-α-紫罗兰醇-9-O-β-D-吡喃葡萄糖苷(12)、(+)-南烛木树脂酚9-O-β-D-吡喃木糖苷(13)、(-)-南烛木树脂酚9-O-β-D-吡喃木糖苷(14)。结论化合物2~5、7~14为首次从绣线菊属植物中分离得到,化合物1和6为首次从该植物中分离得到。     

粗壮润楠中的木脂素类成分

通过萃取、正相硅胶、Sephadex LH-20、中压柱色谱以及反相HPLC柱色谱等多种分离方法相结合,从粗壮润楠树皮乙醇提物中分离得到18个木脂素类化合物;通过质谱和核磁共振等波谱学分析方法鉴定结构为:异落叶松脂素9'-0-β-D-吡喃木糖苷(1),5'-甲氧基异落叶松脂素9 '-O-β-D-吡喃木糖苷(2),南烛木树脂酚9 '-O-β-吡喃木糖苷(3),(+)-(8S,8'S)-4,4 '-二羟基-3,3 ',5,5'-四甲氧基木脂烷-9,9'-二醇9-O-β-D-吡喃木糖苷(4),南烛木树脂酚(5),内消旋二氢愈创木脂酸(6),(+)-(8S,8 'R)-3',4,4'-三羟基-3'-甲氧基木脂烷(7),(8S,8'R)-4'-羟基-3,3',4-三甲氧基木脂烷(8),(+)-愈创木素(9),异愈创木素(10),(-)-(7'R,8R,8 'R)-4,4'-二羟基-3,3',5-三甲氧基-2,7'-环木脂烷(11),翼梗五味子木脂素B(12),(-)-(7S,7'S,8R,8'R)-4,4'-二羟基-3,3',5,5'-四甲氧基-7,7'-环氧木脂素-9,9'-二醇(13),(+)-(7R,8R,7'E)-4-羟基-3,5'-二甲氧基-7,4'-环氧-8,3'-氧新木脂素-7'-烯(14),甘密树皮素B(15),桢楠素Ⅰ(16),(-)-松脂素(17)和(-)-丁香树脂酚(18).以上化合物均为首次从该植物中分离得到.经体外活性筛选,在10 μmol·L-1时,化合物17对小鼠腹腔巨噬细胞分泌NO具有较强的抑制活性,抑制率为72.2％.     

望春玉兰花蕾中木脂素类化学成分的研究

研究木兰科植物望春玉兰花蕾(辛夷)Magnolia biondii中木脂素类化学成分。利用Diaion HP-20,硅胶,Sephadex LH-20及半制备液相等多种色谱技术进行分离纯化,根据化合物的谱学数据和理化性质鉴定化学结构。从该植物中分离得到18个木脂素类化合物,分别鉴定为木兰脂素(1),epimagnolin(2),桉脂素(3),kobusin(4),aschantin(5),里立脂素B二甲醚(6),松脂素单甲醚(7),(+)-de-O-methylmagnolin(8),isoeucommin A(9),丁香树脂醇4-O-β-D-葡萄糖苷(10),连翘脂素(11),落叶松树脂醇-4'-O-β-D-葡萄糖苷(12),conicaoside(13),3,5'-二甲氧基-4',7-环氧-8,3'-新木脂素-4,9,9'-三醇(14),(7R*,8S*)-3,3'-二甲氧基-9,9'-二羟基-苯骈呋喃木脂素-4-O-β-D-葡萄糖苷(15),7S,8R-顺式-7,9,9'-三羟基-3,3'-二甲氧基-8-O-4'-新木脂素-4-O-β-D-葡萄糖苷(16),7S,8R-顺式-4,9,9'-三羟基-3,3'-二甲氧基-8-O-4'-新木脂素-7-O-β-D-葡萄糖苷(17)和(+)-异落叶松树脂醇(18)。化合物7~18为首次从该植物中分离得到。     

短梗五加果中木脂素类成分的分离和鉴定

目的:分离和鉴定短梗五加果提取物中木脂素类化学成分。方法:采用硅胶柱色谱、ODS柱色谱和制备液相等方法对短梗五加果提取物中的化学成分进行分离纯化,并通过NMR和MS等谱学技术确定结构。结果:从短梗五加叶提取物中分离得到7个木脂素类化合物,分别鉴定为丁香树脂酚-4-O-β-D-吡喃葡萄糖苷(1),短梗五加苷E(2),杜仲树脂醇双吡喃葡萄糖苷(3),松脂醇二吡喃葡萄糖苷(4),松脂素-4-O-β-D-吡喃葡萄糖苷(5),(7S,8R)-urolignoside(6),新短梗五加酚(7)。结论:化合物3、5、6为首次从五加属中分离得到。     

窝儿七木脂素类成分研究

目的研究窝儿七Diphylleiasinensis中的木脂素类化学成分。方法采用硅胶和葡聚糖凝胶柱色谱以及半制备液相色谱等方法分离纯化,结合1D/2DNMR、MS、IR等波谱技术鉴定化合物结构。结果从窝儿七中共分离得到7个木脂素,分别鉴定为山荷叶素A(1)、(1S,2R,5S,6R)-2-(4-hydroxyphenyl)-6-(3-methoxy-4-hydroxyphenyl)-3,7-dioxabicyclo[3.3.0]octane(2)、(7S,8R,7′S,8′R)-3,4,3′,4′-tetramethoxy-9,7-dihydroxy-8.8′,7.O.9′-lignan(3)、(-)-落叶松脂醇(4)、vladinol D(5)、鬼臼毒酮(6)、爵床脂素A(7)。结论化合物1为新化合物,化合物2～4首次从窝儿七中分离鉴定。     

瑶山润楠根的化学成分研究

对樟科润楠属植物瑶山润楠Machilus yaoshansis根乙醇提取物的化学成分进行研究。利用多种色谱技术从瑶山润楠的醋酸乙酯萃取物中分离得到15个化合物;通过理化性质和波谱数据鉴定其结构为12个木脂素类(+)-愈创木素(1),kadsuralignan C(2),(+)-异落叶松脂素(3),(+)-5’-甲氧基异落叶松脂素(4),南烛木树脂酚(5),内消旋-裂环异落叶松树脂酚(6),异落叶松脂素-9’-O-β-D-吡喃木糖苷(7),5’-甲氧基-异落叶松脂素-9’-O-β-D-吡喃木糖苷(8),南烛木树脂酚9’-O-β-D-吡喃木糖苷(9),(2R,3R)-2,3-二氢-2-(4-羟基-3-甲氧基苯基)-7-甲氧基-3-甲基-5-(E)-丙烯基苯并呋喃(10),3,5’-二甲氧基-4’,7-环氧-8,3’-新木脂素-4,9,9’-三醇(11),甘密树皮素B(12),和3个黄烷类(+)-儿茶素(13),(-)-表儿茶素(14),bis-8,8’-catechinylmethane(15)。化合物1～15均为首次从该植物中分离得到。     

圆齿野鸦椿中的1个新木脂素

利用硅胶柱色谱、凝胶柱色谱、制备型高效液相色谱等分离技术,对具有抗肝癌活性的圆齿野鸦椿枝条Fr.6提取物进行分离纯化,从中分离得到12个木脂素类化合物。利用现代波谱学手段对化学成分进行结构鉴定,分别鉴定为konilignan(1),(7S,8R)-二氢脱氢二松柏醇9-O-D-吡喃葡萄糖苷(2),illiciumlignan B(3),苏式-1-(4-羟基-3-甲氧基苯基)-2[4-(4′-羟丙基)-2′-甲氧基苯氧基]-1,3-丙二醇(4),赤式-1-(4-羟基-3-甲氧基苯基)-2[4-(4′-羟丙基)-2′-甲氧基苯氧基]-1,3-丙二醇(5),罗汉松脂素(6),荛花酚(7),异落叶松脂素(8),(+)-南烛木树脂酚(9),4-ketopinoresinol(10),丁香脂素(11),vladinol D(12)。其中,化合物1为新的木脂素类化合物。抗肝癌活性结果显示:化合物10和化合物12对人肝癌HepG2细胞具有中等的抑制活性,IC_(50)分别为107.12,183.56μmol·L~(-1)。     

三尖杉茎叶的木脂素类化合物研究

目的研究三尖杉Cephalotaxus fortunei的化学成分。方法采用薄层色谱、正相硅胶柱色谱、ODS反相柱色谱、HP20大孔树脂及Sephadex LH-20凝胶柱色谱、高效液相制备色谱等分离技术进行分离,运用1H-NMR、13C-NMR、ESI-MS等多种波谱技术鉴定化合物的结构。结果从三尖杉的乙醇提取物中分离得到了17个木脂素类化合物,分别鉴定为shonanin(1)、牛蒡子苷元(2)、α-铁杉脂素(3)、罗汉松脂酚(4)、去甲络石苷元(5)、表去甲络石苷元(6)、(7′S)-羟罗汉脂素(7)、(7′R)-羟罗汉脂素(8)、(7′S)-hydroxyarctigenin(9)、开环异落叶松树脂酚(10)、4,4′-di-O-methylcephafortin A(11)、5-(3″,4″-二甲氧基苯基)-3-羟基-3-(4′-羟基-3′-甲氧基苄基)-4-羟甲基二氢呋喃-2-酮(12)、cephafortin B(13)、二氢去氢二愈创木基醇(14)、7R,8S-4,7,9,9′-四羟基-3,3′-二甲氧基-8-O-4′-新木脂素(15)、7R,8R-4,7,9,9′-四羟基-3,3′-二甲氧基-8-O-4′-新木脂素(16)、threo-1,2-双(4-羟基-3-甲氧基苯基)-1,3-丙二醇(17)。结论化合物3、6、10、17为首次从三尖杉属植物中分离得到,4、5、7～9、12、14为首次从三尖杉中分离得到。     

狭叶薰衣草中木脂素类化合物的研究

目的对狭叶薰衣草Lavandulaangustifolia中的木脂素类化合物进行研究。方法运用RP-HPLC、TLC、硅胶、凝胶、MCI-gel树脂等方法进行分离纯化,并根据理化性质和波谱数据鉴定化合物的结构。结果从狭叶薰衣草中分离得到11个木脂素类化合物,分别鉴定为松脂醇(1)、丁香树脂醇(2)、fraxiresinol-4′-O-β-D-glucopyranoside(3)、syringaresinol-4′-O-β-D-glucopyranoside(4)、8-hydroxypinoresinol-4-O-β-D-glucopyranoside(5)、rel-(2α,3β)-7-O-methylcedrusin(6)、落叶松脂醇-4′-O-β-D-葡萄糖苷(7)、(2S,3R)-2,3-dihydro-2-(4-hydroxy-3-methoxyphenyl)-3-hydroxymethyl-7-methoxybenzofuran-5-(trans)propen-1-ol-3-O-β-glucoside(8)、(7S,8R)-dihydrodehydrodiconiferylalcohol-9-β-D-glucopyranoside(9)、(7R,8R)-7,8-dihydro-9′-hydroxyl-3′-methoxyl-8-hydroxymethyl-7-(4-hydroxy-3-methoxyphenyl)-1′-benzofuranpropanol-9′-O-β-D-glucopyranoside(10)、(E)-3-((2S,3S)-2-(4-hydroxy-3-methoxyphenyl)-3-hydroxymethyl-7-methoxy-2,3-dihydrobenzofuran-5-yl)allyl-2-hydroxyacetate(11)。结论 11个化合物均首次从狭叶薰衣草中分离得到。     

鳞腺杜鹃化学成分的研究

目的:研究藏产鳞腺杜鹃地上部分的化学成分。方法:利用多种色谱方法对其成分进行分离纯化,通过理化性质及NMR、MS波谱数据解析鉴定化合物的结构。结果:从中分离得到18个化合物,分别鉴定为:何帕醇-B(1),羽扇豆醇(2),熊果酸(3),扁蓄苷(4),槲皮素(5),杨梅素(6),金丝桃苷(7),杨梅素-3’-O-β-D-吡喃木糖苷(8),(+)-花旗松素-3-O-α-L-吡喃阿拉伯糖苷(9),(+)-花旗松素-3-O-β-D-吡喃葡萄糖苷(10),lyoniside(11),confluentin(12),2-(4-hydroxyphe-nyl)-ethyl triacontanoate(13),2,6-二甲氧基-4-羟基苯酚-1-O-β-D-吡喃葡萄糖苷(14),(-)-2-羟基-5-(2-羟乙基)苯-O-β-D-吡喃葡萄糖苷(15),(-)-isolariciresinol(16),isofraxoside(17),2,4,6-trihydroxacetophenone-3,5-di-C-β-D-glucoside(18)。结论:化合物1,13-18为首次从杜鹃花属植物中分离得到,其余化合物均为首次从该种植物中分离得到。     

石油菜化学成分研究

目的:对民间药材石油菜的化学成分进行研究.方法:用硅胶、葡聚糖凝胶Sephadex LH-20等手段进行分离纯化,并通过1H,13C-NMR,MS等波谱方法鉴定结构.结果:分离鉴定了17个化合物,其中酚酸类6个,分别为苯甲酸(benzoic acid,1),对羟基苯甲醛(4-hydroxy benzaldehyde,2),香豆酸(coumaric acid,3),原儿茶酸(protocatechuic acid,4),没食子酸(gallic acid,5),对羟基苯甲酸(4-hydroxy benzoic acid,6);含N化合物6个,分别为3-吲哚甲醛(3-indole carboxaldehyde,7),3-吲哚甲酸(3-indole carboxylic acid,8),4-甲基-(1,2,3)-三唑[4-methyl-(1,2,3)-tfiazole,9],尿嘧啶(uracil,10),菸酰胺(nicotinamide,11),(2S,E)-N-[2-羟基-2-(4-羟基苯)乙酯]阿魏酰胺{(2S,E)-N-[2-Hydroxy-2-(4-hydroxyphenyl) ethyl] ferulamide,12};5个其他类成分,(+)-去氢催吐萝芙醇[(+)-dehydrovomifoliol,13],正三十一烷(hentriantane,14),β-谷甾醇(β-sitosterol,15),棕榈酸(palmitic acid,16),胡萝卜苷(daucossterol,17).结论:所有化合物均为首次从该属植物中分离得到.     

Three new sesquiterpenes from roots of Curcuma longa

Objective: To study the chemical constituents from the roots of Curcuma longa. Methods: The structures of the new compounds were elucidated based on extensive spectral analysis, including 1D and 2D NMR, MS, UV, and CD analysis. Results: Two new sesquiterpene compounds (1S,2R,5R,7S,8R)-2,8-epoxy-5-hydroxybisabola-3,10-dioen-9-one (1), (1R,2R,5R,7S,8R)-2,8-epoxy-5-hydroxybisabola-3,10-dioen-9-one (2), and a new natural product 6-(4-Hydroxymethylphenyl)-2-methyl-hept-2-ene-4-one (3) together with three known compounds ar-turmerone (4), 2-methyl-6-(4-hydroxyphenyl-3-methyl)-2-hepten-4-one (5) and 2-methyl-6-(4-hydroxyphenyl)-2-hepten-4-one (6) were isolated from C. longa root extract with 95% ethanol. Conclusion: In the study, three new compounds were isolated from C. longa, and their absolute configurations were determined.     

Cytotoxic dolabellane diterpenes from the Formosan soft coral Clavularia inflata

Six new cytotoxic dolabellane diterpenes, (1R,12R)-dolabella-4(16),7,10-triene-3,13-dione (1), (1R*,7R*,8S*,12R*)-dolabella-4(16),10-diene-7,8-epoxy- 3,13-dione (2), (1R*,10R*,11S*,12R*)-dolabella-4(16),7-diene-10,11-epoxy-3,13-dione (3), (1R)-dolabella-4(16),7,11(12)-triene-3,13-dione (4), (1R*,3R*)-3-hydroxydolabella-4(16),7,11(12)-triene-3,13-dione (5), and (1R*,7R*)-7-hydroperoxydolabella-4(16),8(17),11(12)-triene-3,13-dione (6), have been isolated from the Formosan soft coral Clavularia inflata. The structures of compounds 1-6 were determined by 1D and 2D spectral analysis, and their cytotoxicity against selected cancer cells was measured in vitro.     

New dihydrophenanthrene and phenyldihydroisocoumarin constituents of Trema orientalis.

In the course of the chemical investigation of extracts of the trunk bark and root bark of Trema orientalis, three new compounds were isolated, namely, (9S*,10S*)-3-[7-(3,10-dihydroxy-9-hydroxymethyl-2,5-dimethoxy)-9,10-dihydrophenanthrenyl]propenal (1), (9S*,10S*)-3-[7-(5-O-beta-glucopyranosyl-10-hydroxy-9-hydroxymethyl-2,6-dimethoxy)-9,10-dihydrophenanthrenyl]propenal (2), and (3R*,3aR*,4R*,5S*)-6-O-alpha-arabinopyranosyl-8-hydroxy-3-(4-hydroxyphenyl)-4-(4-hydroxyphenyl)-5-(3,5-dihydroxyphenyl)-3,3a-dihydrocyclopenta[1,2,3-de]isobenzopyran-1-one (3, orientoside A). The structures of 1-3 were determined by spectral methods.     

Six new diarylheptanoids from the seeds of Alpinia blepharocalyx

Chromatographic separation of part of an EtOH extract of the seeds of Alpinia blepharocalyx resulted in the isolation of six new (1-6) and two known (7, 8) diarylheptanoids together with 12 known compounds. The structures of the new compounds, including their absolute stereochemistry, were elucidated by spectroscopic and chemical methods as (3S,5S)- (1) and (3S,5R)-3-hydroxy-5-methoxy-1-(4-hydroxyphenyl)-7-phenyl-6E-heptene (2), (3S,5S)- (3) and (3S,5R)-3-hydroxy-5-ethoxy-1-(4-hydroxyphenyl)-7-phenyl-6E-heptene (4), (3S)-methoxy-1,7-bis(4-hydroxyphenyl)-6E-hepten-5-one (5), and 1,7-bis(4-hydroxyphenyl)hepta-4E,6E-dien-3-one (6). Among the isolated compounds, 5, (3S,5S)-3,5-dihydroxy-1,7-bis(4-hydroxyphenyl)heptane (8), 4'-hydroxy-5,6-dehydrokawain (14), and/or phloroglucinol (20) showed significant antiproliferative activity against murine colon 26-L5 carcinoma (ED(50): 5, 5.2 microM; 8, 12.8 microM; 14, 20.7 microM; 20, 26.4 microM) and human HT-1080 fibrosarcoma (ED(50): 5, 10.1 microM; 14, 20.1 microM; 20, 20.9 microM) cells.     

三角叶凤毛菊中类异戊二烯和苯丙素类化学成分

目的:研究菊科药用植物三角叶凤毛菊Saussurea deltoidea的化学成分.方法:利用正/反相硅胶柱层析色谱、凝胶分子筛色谱、HPLC等色谱方法进行化合物的分离,利用波谱学方法鉴定化合物结构.结果:从三角叶凤毛菊中分离出10个化合物,其结构分别鉴定为(3R,6R,7E)-3-hydroxy-4,7 -megastigmadien-9 -one(1),(3S,5R,6S,7E)-5,6-epoxy-3-hydroxy-7-megastigmen-9-one (2),3 -h ydroxy-β-damascone(3),S-(+)-dehydrovomifoliol(4),megastigman-5 -ene-3β,9R-diol(5),coniferaldehyde(6),β-hydroxypropiovanillone (7),3-hydroxy-1- (4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (8),dihydrosyringenin(9),4-[(1S)-3-hydroxy-1-methoxypropyl]-2,6-dimenthoxyphenol( 10).结论:化合物1～10均是首次从该植物中分离得到.     

Terpene isocyanides, isocyanates, and isothiocyanates from the Okinawan marine sponge Stylissa sp

Seven new nitrogenous terpenoids, (1R,6R,7S,10S)-10-isothiocyanatocadin-4-ene (1), (1S,2S,5S,6S,7R,8S)-13-isothiocyanatocubebane (2), (1R,3S,4R,7S,8S,12S,13S)-7-isocyanoamphilecta-10,14-diene (3), (1S,3S,4R,7S,8S,12S,13S)-8-isocyanoamphilecta-11(20),14-diene (4), (3S,4R,7S,8S,11S,13S)-8-isocyanoamphilecta-1(12),14-diene (5), 8-isocyanatocycloamphilect-10-ene (6), and 8-isothiocyanatocycloamphilect-10-ene (7), were isolated from the Okinawan sponge Stylissasp., along with 12 known related compounds. Structural determinations of these compounds were made by spectroscopic analysis, and assessment was made of their cytotoxicity toward HeLa cells.     

苍耳子中苯丙素类化学成分的研究

目的 研究菊科植物苍耳(Xanthium sibiricum Patrin ex Widder)的干燥成熟带总苞的果实(苍耳子)中苯丙素类化学成分。方法 采用正相硅胶柱色谱、反相十八烷基硅烷键合硅胶(ODS)柱色谱、Sephadex LH-20凝胶柱色谱和半制备高效液相色谱(HPLC)等色谱方法进行分离纯化,并结合高分辨质谱(HR-ESI-MS)、核磁共振(NMR)对分离得到的化合物进行结构鉴定。采用脂多糖(LPS)诱导的巨噬细胞RAW 264.7为筛选模型评价分离得到化合物的抗炎活性。结果 从苍耳子体积分数95%乙醇提取物的乙酸乙酯萃取物中分离并鉴定了24个苯丙素类化合物,分别为c-藜芦酰乙二醇(1)、3,4'-二羟基-3'-甲氧基苯丙酮(2)、阿魏醛(3)、丁香脂素(4)、蛇菰宁(5)、落叶松脂醇(6)、愈创木基甘油(7)、3-hydroxy-l-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone(8)、salicifoliol(9)、6-(4-hydroxy-3-methoxyphenyl)-3,7-dioxabicyclo[3.3.0]octan-2-ol(10)、榕醛(11)、jatrointelignan D(12)、icariol A₂(13)、异落叶松脂素(14)、ehletianol C(15)、(7R,7'R,7”S,7‴S,8S,8'S,8”S,8‴S)-4”,4‴-dihydroxy-3,3',3”,3‴,5,5'-hexamethoxy-7,9';7',9-diepoxy-4,8”;4',8‴-bisoxy-8,8'-dineolignan-7”,7‴,9”,9‴-tetraol(16)、(7R,7'R,7”R,7‴S,8S,8'S,8”S,8‴S)-4”,4‴-dihydroxy-3,3',3”,3‴,5,5'-hexamethoxy-7,9';7',9-diepoxy-4,8”;4',8‴-bisoxy-8,8'-dineolignan-7”,7‴,9”,9‴-tetraol(17)、2-(4-hydroxy-3-methoxyphenyl)-1-(4-hydroxyphenyl)-propan-1,3-diol(18)、2,3-bis-(4-hydroxy-3-methoxyphenyl)-3-methoxypropanol(19)、楝叶吴萸素B(20)、threo-guaiacylglycerol-8-vanillin ether(21)、erythro-guaiacylglycerol-8-vanillin ether(22)、黄花菜木脂素B(23)和27-对香豆酰氧基熊果酸(24)。结论 化合物6~24为首次从苍耳中分离得到。对分离得到的24个化合物进行抗炎活性筛选,其中,化合物14、21和23具有抗炎活性,其IC₅₀值分别为(28.14±1.89),(16.78±0.68)和(38.42±2.15)μmol·L^-1。     

Jatrophane diterpenoids from Euphorbia mongolica as modulators of the multidrug resistance of L5128 mouse lymphoma cells

The dried aerial parts of Euphorbia mongolica afforded three new acylated polyhydroxy diterpenoids based on the jatrophane framework. The structures were established by means of a combination of 1D and 2D NMR techniques and mass spectrometry as (2S,3S,4R,5R,7S,8R,13S,15R)-5alpha,7beta,8alpha-triacetoxy-3beta-benzoyloxy-15beta-hydroxyjatropha-6(17),11E-diene-9,14-dione (1), (2S,3S,4R,5R,7S,8S,9S13S,15R)-5alpha,7beta,8alpha,9alpha,15beta-pentaacetoxy-3beta-benzoyloxyjatropha-6(17),11E-dien-14-one (2), and (2S,3S,4R,5R,7S,8S,9S13S,15R)-3beta,7beta,8alpha,9alpha,15beta-pentaacetoxy-5alpha-benzoyloxyjatropha-6(17),11E-dien-14-one (3). When the isolates were assayed for multidrug resistance-reversing activity in a rhodamine 123 exclusion test using L5178 mouse lymphoma cells, all compounds demonstrated a concentration-dependent effect in inhibiting the efflux pump activity of these tumor cells in the range 11.2-112 microM.