Water-soluble constituents from the leaves of Ilex oblonga

Four new water-soluble constituents, oblongaroside A (1), oblongar ester A (2), oblongaroside B (3), and oblongaroside C (4), were isolated along with four known compounds: 4-O-β-d-glucopyranosyl-3-hydroxybenzalcohol (5), 7-methoxyl-4-O-β-d-glucopyranosyl-3-hydroxybenzalcohol (6), 4-O-β-d-glucopyranosyl-3-hydroxybenzoic acid (7), and 3,4-dihydroxybenzoic acid (8) from the leaves of Ilex oblonga. Identification of their structures was achieved by 1D and 2D NMR experiments, including ¹H–¹H COSY, NOESY, HMQC, and HMBC methods and FAB mass spectral data.     

岗梅叶的化学成分

目的对岗梅叶的化学成分进行研究。方法采用反复硅胶柱色谱、凝胶柱色谱进行分离?纯化,并通过其理化性质,结合光谱数据鉴定其化学结构。结果分离得到9个化合物,分别鉴定为:rotundioic acid(1)、2α,3β,19α-三羟基乌索-12-烯-23,28-二羧酸(2)、2α,3β,19α-三羟基齐墩果-12-烯-23,28-二羧酸(3)、山柰酚(4)、山柰酚-3-O-β-D-葡萄糖苷(5)、2(E)-2,6-二甲基-2,7-辛二烯-6-羟基-1-醇苷(6)、2,3-二羟基苯甲酸(7)、β-谷甾醇(8)、胡萝卜苷(9)。结论化合物1-7为从该种植物中首次分离得到。     

Triterpenoid saponins from the leaves of Ilex kudincha

Eight new triterpenoid saponins, kudinosides I-P along with three known saponins were isolated from the leaves of Ilex kudincha. The aglycone moiety of kudinosides I-K was determined as a new triterpene (kudinolic acid), a fore-genin for the lactonic triterpene. The structures of all saponins were established on the basis of spectroscopic and chemical evidence. The biogenesis of the triterpene with lactonic moiety was briefly discussed.     

Triterpene saponins from the leaves of Ilex kudingcha

Three new triterpene saponins, ilekudinosides T–V (1–3), along with six known saponins were isolated from the 70% ethanolic extract of the leaves of Ilex kudingcha. The new saponins were characterized as 3-O-β-d-glucopyranosyl-(1 → 3)-[α-l-rhamnopyranosyl-(1 → 2)]-α-l-arabinopyranosyl-3β,19α-dihydroxy-urs-12(13)-en-28,20β-lactone (1), 3-O-β-d-glucopyranosyl-(1 → 3)-[α-l-rhamnopyranosyl-(1 → 2)]-α-l-arabinopyranosyl-3β,19α-dihydroxy-12-ethoxy-urs-13(18)-ene-28,20β-lactone (2), 3-O-β-d-glucopyranosyl-(1 → 3)-[α-l-rhamnopyranosyl-(1 → 2)]-α-l-arabinopyranosyl-3β,19α-dihydroxy-11-oxo-urs-13(18)-ene-28,20β-lactone (3), respectively. The structures of compounds 1–3 were elucidated on the basis of the chemical and spectroscopic evidence, and the structures of known compounds were identified by comparison of their spectroscopic data with those reported in the literature.     

Studies on chemical constituents from Ilex pubescens

Two new phenolic glycosides, ilexpubsides A and B, along with four known lignan glycosides were isolated from the roots of Ilex pubescens. By spectral evidence, the structures of the new compounds were elucidated as 4-O-β-D-[6'-O-(4'-O-β-D-glucopyranosylvanilloyl)glucopyranosyl] vanillic acid (1) and syringinic 6'-O-β-D-xylopyranoside (2). The known compounds were identified to be liriodendrin (3), (-)-olivil (4), tortoside A (5) and (+)-cyclo-olivil (6). All compounds were first isolated from Ilex pubescens.     

Three new saponins from the leaves of Ilex hylonoma

Three new triterpenoid saponins, hylonosides III-V (1-3) have been isolated, along with three known oleanolic acid saponins (4-6), from the methanol extract of leaves of Ilex hylonoma. The structures were elucidated using a combination of homo- and hetero-nuclear 2D NMR techniques (COSY, TOCSY, NOESY, HMQC and HMBC) and negative FAB-MS. The new compounds were characterized as 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucuronopyranosyl siaresinolic acid-28-O-beta-D-glucopyranosyl ester (1), 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucuronopyranosyl siaresinolic acid-28-O-beta-D-glucopyranosyl ester (2), 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucuronopyranosyl oleanolic acid-28-O-beta-D-glucopyranosyl ester (3).     

岗梅叶的化学成分研究

研究冬青属植物岗梅叶的化学成分,通过硅胶柱色谱、Sephadex LH-20柱色谱、反相硅胶柱色谱、制备高效液相色谱等色谱方法分离纯化得到11个化合物,经多种波谱方法鉴定及与文献对照,其结构分别为kaempferol-3-O-β-D-6′′-acetylglucopyranoside（1）,kaempferol-4＇-methylether（2）,quercetin（3）,quercetin-3-O-glucopyranoside（4）,tormentoside（5）,suavissimoside R1（6）,3β,19α-dihydroxyolean-12-ene-24,28-dioicacid-28-O-β-D-glucopyranoside（7）,3-O-β-sulfooxy-19-hydroxyurs-12-ene-28-oic acid（8）,coniferin（9）,adenoside（10）,1′-O-benzyl-α-L-rhamnopyranosyl-（1′′→6′）-β-D-glucopyranoside（11）。其中化合物1,2,5,9–11为首次从冬青属植物中分离得到,化合物3,4,6–8为首次从岗梅叶中分离得到。     

Two new triterpenoid saponins from the leaves of Ilex kudingcha

Two new triterpene saponins, ilekudinchosides F (1) and G (2), along with three known saponins were isolated from the leaves of Ilex kudingcha C. J. Tseng. The new compounds were characterized as 3β,19α-dihydroxy-12α-ethoxy-urs-13(18)-ene-28,20β-lactone-3-O-[β-D-glucopyranosyl(1 → 3)]-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (1) and 3β,19α-dihydroxy-12α-methoxy-urs-13(18)-ene-28,20β-lactone-3-O-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (2). The new structures were elucidated by spectroscopic methods including 1D and 2D NMR, HR-TOF-MS, and CD spectrometry, and the known compounds were identified by the comparison of their NMR and HR-TOF-MS data with those reported in the literature.     

Triterpenes and triterpenoid saponins from the leaves of Ilex kudincha

One new triterpene, kudinchalactone A (1), and four new triterpenoid saponins, ilekudinchosides A-D (2- 5), were isolated from the leaves of Ilex kudincha C.?J. Tseng along with eight known triterpenoids. These new compounds were elucidated by spectroscopic methods including 1D and 2D NMR, HR-TOF-MS, and CD spectra. Compounds 2, 3, 12, and 13 showed antibacterial activities against Staphylococcus aureus (SA) and methicillin-resistant Staphylococcus aureus (MRSA).     

Water-soluble constituents from aerial roots of Ficus microcarpa

Three new water-soluble constituents [ficuscarpanoside B (1), (7E,9Z)-dihydrophaseic acid 3-O-beta-D-glucopyranoside (4) and ficuscarpanic acid (6)] and the natural product 2,2'-dihydroxyl ether (7) have been isolated, together with three known compounds [(7S,8R)-syringoylglycerol (2), (7S,8R)-syringoylglycerol-7-O-beta-D-glucopyranoside (3) and icariside D2 (5)] from the aerial roots of Ficus microcarpa. Identification of their structures was achieved by 1D and 2D NMR experiments, including 1H-1H COSY, NOESY, HMQC and HMBC methods and FAB mass spectral data.     

Water-soluble constituents from aerial roots of Ficus microcarpa

Three new water-soluble constituents [ficuscarpanoside B (1), (7E,9Z)-dihydrophaseic acid 3-O-β-d-glucopyranoside (4) and ficuscarpanic acid (6)] and the natural product 2,2′-dihydroxyl ether (7) have been isolated, together with three known compounds [(7S,8R)-syringoylglycerol (2), (7S,8R)-syringoylglycerol-7-O-β-d-glucopyranoside (3) and icariside D₂ (5)] from the aerial roots of Ficus microcarpa. Identification of their structures was achieved by 1D and 2D NMR experiments, including ¹H–¹H COSY, NOESY, HMQC and HMBC methods and FAB mass spectral data.     

Leishmanicidal constituents from the leaves of Piper rusbyi

The kavapyrone (+)-(7 R,8 S)-epoxy-5,6-didehydrokavain (1) and the chalcone flavokavain B (2) were isolated from Piper rusbyi as the bioactive components by bioassay-guided fractionation, using an in vitro assay against promastigote forms of three Leishmania strains. In addition, the new kavapyrone, (7 R,8 R/7 S,8 S)-dihydroxy-5,6-didehydrokavain (3), which is very likely an artifact, and four known compounds (4-7) were isolated. Their structures were elucidated on the basis of spectral analysis, and the absolute configurations of compounds 1 and 3 were established by CD studies and the modified Mosher ester procedure, respectively. All compounds were evaluated for in vitro leishmanicidal activity. The most active compounds 1 (IC50=81.9 microM) and 2 (IC50=11.2 microM) were also evaluated in vivo against a New World strain of cutaneous leishmaniasis, and the results showed the efficacy of 2 at a dose of 5 mg/kg/day. Compounds 1 and 3 were also assayed as reversal agents against a multidrug-resistant Leishmania tropica line, but were found to be inactive.     

水烛香蒲叶的化学成分研究

目的研究水烛香蒲叶的化学成分。方法采用硅胶柱色谱、凝胶柱色谱、开放ODS柱色谱、HPLC等方法进行分离纯化,并利用波谱学方法对所得成分进行结构鉴定。结果分离并鉴定了6个苯丙素类化合物及2个其他类化合物,分别为:9-正丁基-异愈创木基丙三醇(1),9-正丁基-愈创木基丙三醇(2),1-O-对香豆酰基甘油酯(3),1,3-O-二对香豆酰基甘油酯(4),(-)-丁香脂素(5),松脂醇(6),2,3-二-(3-甲氧基-4-羟基)苯基-3-甲氧基丙醇(7),2,3-二-(3-甲氧基-4-羟基)苯基-3-丁氧基丙醇(8)。结论化合物1～5,7,8为属内首分的已知化合物。     

Triterpene constituents from the leaves of Melicope indica

Phytochemical investigation of a petroleum ether extract of Melicope indica afforded two unusual pentacyclic triterpenes viz. neohop-13(18)-en-3alpha-ol (1) and fern-8(9)-en-3beta-ol (2) and the ubiquitous steroids, stigmasterol and sitosterol. The structures of 1 and 2 were independently elucidated on the basis of 2D NMR data and confirmed by comparison with those of related compounds. While compound 1 is a new natural product, this is the first report of occurrence of fern-8(9)-en-3beta-ol (2) from the genus Melicope.     

Studies on the chemical constituents of Ilex pubescens

Three new compounds, ilexisochromane (1), ilex acid A (2), and ilex acid B (3), were isolated from the roots of Ilex pubescens. Their structures were elucidated using the combination of 1- and 2-D NMR and mass spectrometry analyses.     

Studies on the chemical constituents of Ilex pubescens

Three new compounds, ilexisochromane (1), ilex acid A (2), and ilex acid B (3), were isolated from the roots of Ilex pubescens. Their structures were elucidated using the combination of 1- and 2-D NMR and mass spectrometry analyses.     

淡竹叶的化学成分研究

目的研究淡竹叶的化学成分。方法采用系统提取,柱层析方法分离,经理化性质和波谱技术确定所得化合物的结构。结果分离得到6个化合物,鉴定为三十九烷酸(Ⅰ),正三十二烷醇(Ⅱ),三十一烷酸(Ⅲ),对羟基苯甲醛(Ⅳ),反式对香豆酸(Ⅴ),日当药黄素(Ⅵ)。结论化合物Ⅰ～Ⅲ,Ⅴ和Ⅵ均为首次从该植物中分离得到。     

Chemical constituents from the leaves of Cistus parviflorus

A phytochemical investigation on the leaves of Cistus parviflorus led to the isolation of 18 compounds. The structures of the isolated compounds were elucidated as kaempferol 3-O-(3′′,6′′-di-O-E-p-coumaroyl)-β-D-glucopyranoside (1), scopoletin (2),kaempferol 3-O-(3′′-O-E-p-coumaroyl)-β-D-glucopyranoside (3), kaempferol 3-O-(6′′-O-E-p-coumaroyl)-β-D-glucopyranoside (4), kaempferol 3-O-β-D-glucopyranoside (5), kaempferol 3-O-α-L-rhamnopyranosyl-(1→2)-(6′′-O-E-p-coumaroyl)-β-D-glucopyranoside (6), methyl flavogallonate(7), quercetin 3-O-β-D-glucopyranoside (8), quercetin 3-O-β-D-galactopyranoside (9), hydroquinone (10), arbutin (11), methyl β-glucopyranoside (12), shikimic acid (13), (S)-1,2-propandiol-1-O-β-D-glucopyranoside (14), benzyl-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranoside (15), 2-phenethyl-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranoside (16), corchoionoside C (17), kaempferol 3-O-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside (18) by the analysis of the MS and NMR spectroscopic data and comparison with the literature. Compounds 1–2, 6–7, 10–12, and 14–16 were isolated from Cistus genus for the first time.     

茶叶的化学成分

目的分离并鉴定茶叶(Camellia sinensis)中的化学成分。方法采用硅胶柱色谱、羟丙基葡聚糖凝胶(Sephadex LH-20)柱色谱和重结晶等多种分离方法对体积分数为70%的乙醇溶液回流提取物进行分离,并通过NMR和MS等多种谱学方法对分离得到的化学成分进行结构鉴定。结果分离得到8个化合物,分别鉴定为咖啡碱(caffeine,1)、可可碱(theobromine,2)、山柰酚(kaempferol,3)、(+)儿茶素((+)-catechin,4)、胡萝卜苷(daucosterol,5)、(Z)-9-十六碳烯酸((Z)-9-hexadecenoic acid,6),苯基-β-萘胺(phenyl-β-naphthylamine,7)和没食子酸(gallic acid,8)。结论其中化合物5、6和7为首次从该属植物中分离得到。     

Two new hemiterpene glycosides from the leaves of Ilex rotunda. thunb

Chromatographic separation of the 80% MeOH extract of the leaves of Ilex rotunda (IR) led to isolation of two new hemiterpene glycosides, tentatively named as rotundarpenoside A (1) and rotundarpenoside B (2), along with five known caffeoyl derivatives (3–7). The chemical structures of these compounds were elucidated using 1D/2D NMR, HR-MS, and the absolute configuration was confirmed by Mosher’s method. In order to evaluate their anti-oxidative activities, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and xanthine oxidase superoxide scavenging activities (NBT) were determined.