桃儿七中酚类成分研究

目的研究桃儿七Sinopodophyllum emodi的酚类成分。方法通过多种色谱方法进行分离纯化,根据理化性质和波谱数据进行结构鉴定。结果从桃儿七中分离得到10个化合物,分别鉴定为对羟基苯甲醛(1)、原儿茶酸(2)、4-羟基-3-甲氧基苯乙酮(3)、香草酸(4)、香草酸-4-O-β-D-葡萄糖苷(5)、ilexpubside A(6)、对羟基苯乙醇(7)、苯乙醇-4-O-β-D-木糖基-(1→6)-β-D-葡萄糖苷(8)、2-(4′-羟苯基)-硝基乙烷(9)、2-(4′-羟苯基)-硝基乙烷-4′-O-β-D-木糖基-(1→6)-β-D-葡萄糖苷(10)。结论化合物1～6、9、10为首次从该属植物中分离得到。     

New Sesquiterpenes from Litsea verticillata

Seven new sesquiterpenes, named litseagermacrane (1), 7-epi-eudesm-4(15)-ene-1alpha,6alpha-diol (2), 5-epi-eudesm-4(15)-ene-1beta,6beta-diol (4), litseahumulanes A (6) and B (7), and litseachromolaevanes A (11) and B (12), as well as the known compounds 7-epi-eudesm-4(15)-ene-1beta,6beta-diol (3), eudesm-4(15)-ene-1beta,6alpha-diol (5), octahydro-4-hydroxy-3alpha-methyl-7-methylene-alpha-(1-methylethyl)-1H-indene-1-methanol (8), 10-hydroxyl-15-oxo-alpha-cadinol (9), and aphanamol II (10), were isolated from an anti-HIV fraction of the leaves and twigs of Litsea verticillata Hance (Figure 1). Isolates 1, 4, and 12 were found to inhibit HIV-1 replication in a green fluorescent protein (GFP)-based reporter cell line (HOG.R5) with IC(50) values of 6.5 (27.5), 17.4 (73.1), and 28.0 (119.7) microg/mL (microM), respectively. The structures of these isolates were determined by spectral data including 1D and 2D NMR spectra. Compound 11 was confirmed by X-ray crystallographic analysis.     

Five new phenolics from the roots of Ficus beecheyana

From the ethanolic extract of the roots of Ficus beecheyana, threo-2,3-bis(4-hydroxy-3-methoxyphenyl)-3-ethoxypropan-1-ol (1), erythro-2,3-bis(4-hydroxy-3-methoxyphenyl)-3-ethoxypropan-1-ol (2), trans-4,5-bis(4-hydroxy-3-methoxyphenyl)-1,3-dioxacyclohexane (3), threo-3-(4-hydroxy-3,5-dimethoxyphenyl)-3-ethoxypropane-1,2-diol (4), 2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (5), and 3-hydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (6) were isolated. The structures of the new compounds 1-5 were elucidated by the analysis of their spectroscopic data.     

直立白薇化学成分研究

目的：研究直立白薇的化学成分。方法：利用色谱技术进行分离和纯化,并通过现代光谱方法鉴定其化学结构。结果：分离得到12个化合物,并鉴定了其中的9个,分别为2,4-二羟基苯乙酮(1),2,6-二羟基苯乙酮(2),4-羟基苯甲醇(3),苯甲酸(4),β-香树素乙酸酯(5),棕榈酸(6),β-谷甾醇(7),β-胡萝卜苷(8),白前苷元C-3-O-α-D-吡喃夹竹桃糖基-(1→4)-β-D-吡喃洋地黄毒糖基-(1→4)-α-D-吡喃夹竹桃糖苷(9)。结论：化合物2～8为首次从该植物中分得。     

Four new eudesmanes from Caragana intermedia and their biological activities

Four new eudesmanes, namely, 4(15)-eudesmene-1beta,7alpha-diol (1), 4(15)-eudesmene-1beta,7beta-diol (2), 7-trinoreudesma-4(15),8-dien-1beta-ol-7-one (3), and eudesma-4(15),7-dien-1beta-ol (4), as well as three known compounds, 5-epi-eudesma-4(15)-ene-1beta,6beta-diol (5), 4(15)-eudesmene-1beta,6alpha-diol (6), and 4(15)-eudesmene-1beta,5alpha-diol (7), were isolated from the aerial part of Caragana intermedia. The structures were elucidated by spectroscopic and spectrometric analyses including 1D, 2D NMR, HRMS, and IR. The structures of compounds 1, 5, 6, and 7 were confirmed by X-ray crystallographic analysis. Compound 7 showed glucose consumption activity with an IC value of 10.7 microg/mL in a C2C12 muscle cell assay. The MIC value of this compound (100 mg/kg) in a db/db mice model is equivalent to that of metformin in vivo.     

Acylated preatroxigenin glycosides from Atroxima congolana

Six new acylated bisdesmosidic preatroxigenin saponins named atroximasaponins E1, E2 (1, 2), F1, F2 (3, 4), and G1, G2 (5, 6) were isolated as three inseparable mixtures of the trans- and cis-p-methoxycinnamoyl derivatives, from the roots of Atroxima congolana. Their structures were established through extensive NMR spectroscopic analysis as 3-O-beta-D-glucopyranosylpreatroxigenin-28-O-beta-D-xylopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->2)-[beta-D-glucopyranosyl-(1-->3)]-[4-O-trans-p-methoxycinnamoyl]-beta-D-fucopyranoside (atroximasaponin E1, 1), and its cis-isomer, atroximasaponin E2 (2), 3-O-beta-D-glucopyranosylpreatroxigenin-28-O-beta-D-xylopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->2)-[6-O-acetyl-beta-D-glucopyranosyl-(1-->3)]-[4-O-trans-p-methoxycinnamoyl]-beta-D-fucopyranoside (atroximasaponin F1, 3), and its cis-isomer, atroximasaponin F2 (4), 3-O-beta-D-glucopyranosylpreatroxigenin-28-O-beta-D-apiofuranosyl-(1-->3)-[alpha-l-rhamnopyranosyl-(1-->2)]-[4-O-trans-p-methoxycinnamoyl]-beta-D-fucopyranoside (atroximasaponin G1, 5), and its cis-isomer, atroximasaponin G2 (6), respectively.     

Antiinflammatory constituents from Heterotheca inuloides

Three new compounds, cadalen-15-oic acid (1), 3,7-dihydroxy-3(4H)-isocadalen-4-one (2), and dicadalenol (3), were isolated from the aerial parts of Heterotheca inuloides (Mexican arnica), together with the known compounds 7-hydroxycadalene (4), 7-hydroxy-4alphaH-3,4-dihydrocadalene (5), 1alpha-hydroxy-1(4H)-isocadalen-4-one (6), 1alpha-hydroxy-4alphaH-1,2,3,4-tetrahydrocadalen-15-oic acid (7), 7-(3,3-dimethylallyloxy)coumarin, caryolan-1,9beta-diol, and quercetin. The structures of the new compounds were elucidated by spectroscopic methods. The antiinflammatory activities of the extracts and the isolated compounds were evaluated by determining the inhibition of TPA-induced mouse ear edema. The natural products 3, caryolan-1,9beta-diol, and quercetin were the most active substances tested and displayed dose-dependent activities.     

Anti-HIV-1 protease triterpenoid saponins from the seeds of Aesculus chinensis

Eight bioactive triterpenoid saponins (1-8) were isolated from the seeds of Aesculus chinensis, four of which are novel compounds. The major saponins were identified as escin Ia (1), Ib (2), isoescin Ia (3) and Ib (4), while the new compounds were identified as 22alpha-tigloyl-28-acetylprotoaescigenin-3beta-O-?beta -D-glucopyranos yl (1-2) ?beta-D-glucopyranosyl (1-4)-beta-D-glucopyranosiduronic acid (escin IVc, 5), 22alpha-angeloyl-28-acetylprotoaescigenin-3beta-O-?bet a-D-glucopyrano syl (1-2) ?beta-D-glucopyranosyl (1-4)-beta-D-glucopyranosiduronic acid (escin IVd, 6), 28-tigloylprotoaescigenin-3beta-O-?beta-D-glucopyranosyl (1-2) ?beta-D-glucopyranosyl (1-4)-beta-D-glucopyranosiduronic acid (escin IVe, 7), and 28-angeloylprotoaescigenin-3beta-O-?beta-D-glucopyranosyl (1-2) ?beta-D-glucopyranosyl (1-4)-beta-D-glucopyranosiduronic acid (escin IVf, 8). The structures were determined by chemical and spectroscopic methods. All the above compounds were evaluated for their inhibitory activity against HIV-1 protease.     

艾迪注射液的化学成分研究

目的 研究艾迪注射液的化学成分.方法 利用反相半制备液相色谱、Sephadex LH-20凝胶柱色谱等方法分离纯化,并通过光谱数据鉴定化合物结构.结果 分离得到22个化合物,分别鉴定为3-O-(3′,4′-二乙酰氧基)-β-D-吡喃木糖基-6-O-β-D-吡喃葡萄糖基-环黄芪醇(1)、黄芪甲苷(2)、黄芪皂苷Ⅱ (3)、黄芪皂苷Ⅰ(4)、异黄芪皂苷Ⅰ(5)、乙酰黄芪皂苷Ⅰ(6)、人参皂苷Re (7)、人参皂苷Rf(8)、人参皂苷Rg1 (9)、人参皂苷Rb3 (10)、三七皂苷R4 (11)、人参皂苷Rb1 (12)、人参皂苷Rc (13)、人参皂苷Rb2 (14)、人参皂苷Rd (15)、丝瓜苷H(16)、3-O-β-D-吡喃葡萄糖基(1→4)-β-D-吡喃葡萄糖基(1→3)-α-L-吡喃鼠李糖(1→2)-α-L-吡喃阿拉伯糖-齐墩果酸-28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡萄糖(1→6)-β-D-吡喃葡萄糖酯苷(17)、3-O-β-D-吡喃葡萄糖基(1→3)-α-L-吡喃鼠李糖[β-D-吡喃葡萄糖基-(1→4)]-(1→2)-α-L-吡喃阿拉伯糖-齐墩果酸-28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡萄糖(1→6)-β-D-吡喃葡萄糖酯苷(18)、紫丁香苷(19)、刺五加皂苷E(20)、4-(1,2,3-三羟基丙基)-2,6-二甲氧基苯-1-O-β-D-葡萄糖苷(21)、松柏苷(22).结论 经LC-MS分析检测,化合物1～6为黄芪中的化学成分,化合物7～18为人参中的化学成分,化合物19～22为刺五加中的化学成分,其中化合物1为新化合物,命名为新黄芪皂苷Ⅰ.     

A New Triterpenoid Saponin from Aidi Injection

Objective To investigate the chemical constituents from Aidi Injection.Methods The chemical constituents were isolated by chromatography on Sephadex LH-20 gel columns and reverse phase semi-preparative HPLC repeatedly.Their structures were identified by spectroscopic analysis(NMR and MS).Results Twenty-two compounds were isolated and identified to be 3-O-3′,4′-diacetyl-β-D-xylopyranosyl-6-O-β-D-glucopyranosyl- cycloastragenol(1),astragaloside IV(2),astragaloside II(3),astragaloside I(4),isoastragaloside I(5), acetylastragaloside I(6),ginsenosid Re(7),ginsenoside Rf(8),ginsenoside Rg1(9),ginsenoside Rb3(10), notoginsenoside R4(11),ginsenoside Rb1(12),ginsenoside Rc(13),ginsenoside Rb2(14),ginsenoside Rd(15), lucyoside H(16),3-O-β-D-glucopyranosyl(1→4)-β-D-glucopyranosyl(1→3)-α-L-rhamnopyranosyl(1→2)-α-L- arabinopyranosyl oleanolic acid 28-O-α-L-rhamnopyranosyl(1→4)-β-D-glucopyranosyl(1→6)-β-D-glucopyranoside (17),3-O-β-D-glucopyranosyl(1→3)-α-L-rhamnopyranosyl[β-D-glucopyranosyl-(1→4)]-(1→2)-α-L-arabinopyranosyl oleanolic acid 28-O-α-L-arabinopyranosyl(1→4)-β-D-glucopyranosyl(1→6)-β-D-glucopyranoside(18),syringin (19),elentheroside E(20),4-(1,2,3-trihydroxypropyl)-2,6-dimethoxyphenyl-1-O-β-D-glucopyranoside(21),and coniferin(22).Conclusion Compounds 1-6 are originated from Astragalus membranceus,compounds 7-18 are originated from Panax ginseng,and compounds 19-22 are originated from Acanthopanax senticosus by LC-MS analysis.Compound 1 is a new compound.     

红药苯乙醇苷类化学成分的研究

目的:分离鉴定红药干燥茎的化学成分。方法:甲醇提取,硅胶、Sephadex LH-20及ODS柱色谱分离,采用NMR和MS等方法确定化合物的结构。结果:分离鉴定了5个苯乙醇苷类化合物,分别为3,4-dihydroxyphenylalcohol-β-D-glucopyranoside(1),3,4-dihydroxyphenyl alcohol-6-O-caffeoyl-β-D-glucopyranoside(calceolarioside B)(2),3,4-di-hydroxyphenyl alcohol-β-D-glucopyranosyl-(1→3)-6-O-caffeoyl-β-D-glucopyranoside(plantainoside D)(3),3,4-dihydroxyphenylalcohol-β-D-glucopyranosyl-(1→3)-4-O-caffeoyl-β-D-glucopyranoside(plantamajoside)(4),3,4-dihydroxyphenyl alcohol-β-D-glucopyranosyl-(1→3)-6-O-feruloyl-β-D-glucopyranoside(scroside E)(5)。结论:化合物3,5为首次从该科植物中得到,化合物1,2,4为首次从该属植物中得到。     

Phenylethanoid glycosides from Globularia trichosantha.

Five phenylethanoid glycosides, crenatoside (= oraposide) (1), verbascoside (= acteoside) (2), trichosanthoside A (3), rossicaside A (4), and trichosanthoside B (5), were isolated from the aerial parts of Globularia trichosantha. Compounds 3 and 5 are new natural compounds, and their structures were established as 3, 4-dihydroxy-beta-phenylethoxy-O-beta-D-xylopyranosyl-(1-->4)-alpha -L- rhamnopyranosyl-(1-->3)-4-O-caffeoyl-beta-D-glucopyranoside and 3, 4-dihydroxy-beta-phenylethoxy-O-[beta-D-xylopyranosyl-(1-->4)-alph a-L -rhamnopyranosyl-(1-->3)]-[beta-D-xylopyranosyl-(1-->6)]-4-O-caffeoyl -beta-D-glucopyranoside, respectively. The structures of all compounds were established by spectral evidence. Compounds 1-5 also demonstrated scavenging properties toward the 2, 2-diphenyl-1-picrylhydrazyl radical in TLC autographic assays.     

New amide alkaloids from the roots of Piper nigrum

Seven new amide alkaloids, named N-isobutyl-4-hexanoyl-4-hydroxypyrrolidin-1-one (1), (+/-)-erythro-1-(1-oxo-4,5-dihydroxy-2E-decaenyl)piperidine (2), (+/-)-threo-1-(1- oxo-4,5-dihydroxy-2E-decaenyl)piperidine (3), (+/-)-threo-N-isobutyl-4,5-dihydroxy-2E-octaenamide (4), 1-(1,6-dioxo-2E,4E-decadienyl)piperidine (5), 1-[1-oxo-3(3,4-methylenedioxy-5-methoxyphenyl)-2Z-propenyl]piperidine (6), and 1-[1-oxo-5(3,4-methylenedioxyphenyl)-2Z,4E-pentadienyl]pyrrolidine (7), were isolated from the roots of Piper nigrum, together with 32 known amides. Their structures were elucidated on the basis of spectroscopic analysis and chemical evidence.     

地乌中的三萜皂苷类成分

目的：研究地乌Anemone flaccida中的化学成分。方法：采用硅胶柱色谱、凝胶柱色谱、反相HPLC制备色谱等多种方法分离化合物，采用波谱方法鉴定化合物的结构。结果：从地乌根茎中分离得到12个三萜类化合物，分别为齐墩果酸(1)，齐墩果酸3-O-β-D-吡喃葡萄糖-(1→2)-β-D-吡喃木糖苷(2)，五加苷K(3)，齐墩果酸3-O-α-L-吡喃鼠李糖-(1→2)-β-D-吡喃木糖苷(4)，齐墩果酸3-O-β-D-吡喃葡萄糖-(1→2)-α-L-吡喃阿拉伯糖苷(5)，齐墩果酸3-O-βD--吡喃葡萄糖醛酸(6)，齐墩果酸3-O-β-D-吡喃葡萄糖醛酸甲酯(7)，齐墩果酸28-O-α-L-吡喃鼠李糖-(1→4)-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖苷(8)，齐墩果酸3-O-β-D-吡喃葡萄糖醛酸28-O-α-L-吡喃鼠李糖-(1→4)-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖苷(9)，齐墩果酸3-O-β-D-吡喃葡萄糖醛酸甲酯28-O-α-L-吡喃鼠李糖-(1→4)-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖苷(10)，齐墩果酸3-O-β-D-吡喃葡萄糖-(1→2)-β-D-吡喃木糖28-O-α-L-吡喃鼠李糖-(1→4)-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖苷(11)，齐墩果酸3-O-α-L-吡喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖28-O-α-L-吡喃鼠李糖-(1→4)-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖苷(12)。结论：化合物5～8，10,12为首次从该植物中分离得到；化合物2,5,11对Hela,BEL-7402和HL-60细胞具有细胞毒性。     

Antioxidant phenolic glycosides from Moricandia arvensis

The new phenolic glycosides quercetin 3,4'-di-O-beta-d-glucopyranoside-7-O-alpha-l-rhamnopyranoside (moricandin) (1), beta-d-glucopyranosyl 4-O-beta-d-glucopyranosylcaffeate (2), methyl 3-O-beta-d-glucopyranosyl-5-hydroxycinnamate (3), and beta-d-glucopyranosyl 4-O-beta-d-glucopyranosylbenzoate (4), together with the previously known beta-d-glucopyranosyl 4-hydroxybenzoate (5), methyl 4-O-beta-d-glucopyranosylcaffeate (6), 1-O-caffeoyl-beta-d-glucopyranoside (7), and 2-phenylethyl-beta-d-glucopyranoside (8), were isolated from the flowers of Moricandia arvensis. Their structures were elucidated by extensive spectroscopic analysis and chemical methods. Compounds 1-8 were evaluated for antioxidant activity using DPPH, TEAC, and reducing power assays, where the caffeic acid derivative 7 and the quercetin triglycoside 2 proved to possess the most potent scavenging activity.     

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??OBJECTIVE To study the chemical constituents from the fruits of Forsythia suspensa (Thunb.) Vahl.. METHODS Compounds were isolated by a combination of various chromatographic techniques including column chromatography over macroporous resin, Sephadex LH-20 and reversed-phase HPLC. Their structures were elucidated by physiochemical properties and spectral analysis. RESULTS Sixteen compounds were isolated and identified as 3,4,??-trihydroxy-methyl phenylpropionate (1), protocatechaldehyde (2), vanillic acid (3), p-hydroxybenzoic acid (4), p-hydroxylbenzylalcohol (5), p-hydroxyphenylethyl alcohol (6), 2-(4-methoxyphenyl) acetaldehyde (7), 2-(4-hydroxyphenyl)acetic acid (8), 4-hydroxyphenethyl 2-(4-hydroxyphenyl)acetate (9), p-coumatic acid (10), methyl 2-(4-hydroxyphenyl)acetate (11), 3,4-dihydroxyphenylethanol (12), 1,2,4-benzentriol (13), 1-(4-hydroxyphenyl)-2,3-dihydroxypropan-1-one(14), 4-hydroxybenzaldehyde (15), and isovanillic acid (16). CONCLUSION Compounds 1-3, 5, 7, 9, 11, and 14 are isolated from this plant for the first time.     

Flavonoid glycosides from Adina racemosa and their inhibitory activities on eukaryotic protein synthesis

From the dried leaves, flowers, and twigs of Adina racemosa, five new flavonoid glycosides, quercetin 3-O-alpha-l-rhamnopyranosyl(1-->6)-(3-O-trans-p-coumaroyl)-beta-d-galactopyranoside (1), quercetin 3-O-alpha-l-rhamnopyranosyl(1-->6)-[(4-O-trans-p-coumaroyl)-alpha-l-rhamnopyranosyl(1-->2)]-(4-O-trans-p-coumaroyl)-beta-d-galactopyranoside (2), kaempferol 3-O-alpha-l-rhamnopyranosyl(1-->6)-[(4-O-trans-p-coumaroyl)-alpha-l-rhamnopyranosyl(1--> 2)]-(4-O-trans-p-coumaroyl)-beta-d-galactopyranoside (3), quercetin 3-O-alpha-l-rhamnopyranosyl(1-->6)-[(4-O-trans-p-coumaroyl)-alpha-l-rhamnopyranosyl(1-->2)]-(3-O-trans-p-coumaroyl)-beta-d-galactopyranoside (4), and quercetin 3-O-alpha-l-rhamnopyranosyl(1-->6)-[(4-O-trans-caffeoyl)-alpha-l-rhamnopyranosyl(1-->2)]-(3-O-trans-p-coumaroyl)-beta-d-galactopyranoside (5), and eight known compounds were isolated. The structures of the new compounds were determined by spectroscopic and chemical means. Their inhibitory activities on protein synthesis were assessed. The new glycosides were found to be inhibitors of eukayrotic, but not prokaryotic, protein synthesis.     

天麻水提取物的化学成分研究

通过大孔吸附树脂、MCI树脂、正相硅胶、Sephadex LH-20、制备薄层色谱和反相HPLC等多种色谱分离方法相结合,从天麻水提物中分离得到23个化合物;借助多种波谱学分析方法鉴定他们的结构为:4-羟基-3-(4-羟基苄基)苄基甲醚(1),4-(甲氧甲基)苯基-1-O-β-D-吡喃葡萄糖苷(2),4-羟基-3-(4-羟基苄基)苯甲醛(3),4-(4-羟基苄基)-2-甲氧基苯酚(4),4,4’-亚甲基双(2-甲氧基苯酚)(5),L-苯基乳酸(6),3-甲氧基-4-羟基苄基乙醚(7),对羟基苯甲醇(8),对羟基苄基甲醚(9),对羟基苄基乙醚(10),对羟基苯甲醛(11),对羟基苯甲酸(12),对甲氧基苯甲酸(13),天麻素(14),4-(乙氧甲基)苯基-1-O-β-D-吡喃葡萄糖苷(15),对醛基苯基-1-O-β-D-吡喃葡萄糖苷(16),对甲苯基-1-O-β-D-吡喃葡萄糖苷(17),甲基-O-β-D-吡喃葡萄糖苷(18),5-羟甲基糠醛(19),派立辛(20),派立辛B(21),派立辛C(22)和薯蓣皂苷元(23)。其中化合物1和2为新化合物,化合物3～7,18和23为首次从该属植物中分离得到,并首次报道化合物4的碳谱数据。     

川芎化学成分研究

目的：对伞形科藁本属植物川芎Ligusticum chuanxiong干燥的根茎进行化学成分研究。方法：川芎的干燥根茎用水提取,依次用醋酸乙酯,正丁醇萃取,对醋酸乙酯部分采用各种柱色谱进行分离纯化,通过波谱数据分析进行结构鉴定。结果：从醋酸乙酯部分分离11个化合物,分别鉴定为：(4S)-p-menth-1-ene-4,7diol(1),aromadendrane-4α,10β-diol(2),aromadendrane-4α,10α-diol(3),aromadendrane-4β,10β-diol(4),augustic acid(5),川芎三萜(xiongterpene,6),孕(甾)烯醇酮(pregnenolone,7),镰叶芹二醇［3(R),8(S),9(Z)-falcarindiol,8］,洋川芎内酯F(senkyunolide F,9),洋川芎内酯I(senkyunolide I,10),4-羟基-3-丁基苯肽(4-hydroxyl-3-butylphthalide,11)。结论：化合物1～5为首次从该种中分离得到。     

喜树中两个DNA拓扑异构酶Ⅰ抑制剂

目的：以生物活性为向导在喜树中寻找天然的DNA拓扑异构酶Ⅰ抑制剂。方法：用各种层析方法和波谱方法从喜树中分离并鉴定了14个化合物。结果：其结构分别鉴定为喜树碱(1)，肌醇(2)，喜果苷(3)，3’甲基3，4O，O-亚甲基鞣花酸-4’-D-β-D-吡喃葡萄糖苷(4)，2-氧-1，2-二氢．喹啉4酸(5)，马钱子酸(6)，4-甲基-1，2-环己烷二甲醇(7)，strictosamide(8)，獐芽菜苷(9)，乙酰胺(10)，氯原酸(11)，strictosidinic acid(12)，1-咖啡酰基奎宁酸(13)和10-羟基喜树碱(14)。结论：化合物4-13为首次从该植物中分得，化合物4的核磁数据在文献中有误，本文对其进行了重新归属。经体外活性测试，化合物1对DNA拓扑异构酶Ⅰ有中等程度的抑制作用，化合物4，14对DNA拓扑异构酶Ⅰ有强的抑制作用。