翼梗五味子的研究 V.五脂素A_1,A_2,表五脂素A_1和epischisandrone的结构

从四川宜宾产翼梗五味子的果实中分得七个四氢萘木脂素,其中三个鉴定为:恩施辛enshicine(1),表恩施辛epienshicine(2)和schisandrone(3),其余四个均属新化合物,命名为五脂素wulignan A_1(4),A_2(5),表五脂素epiwulignan A_1(6)和epischisandrone (7).它们的结构(包括绝对构型)由光谱分析和化学转化为(+)-dimethylguaiacine(6b)和(-)-dimethylisoguaiacine(4b)而阐明.四个新化合物皆有不同程度的体外抗癌活性.     

神农架地区五味子科植物成分的研究 I: 铁箍散茎和根的化学成分研究

用铁箍散的茎和根中分得六个化合物, 其中一个是新化合物, 命名为表恩施辛(1,epienshicine), 在体外具有抗癌活性. 其结构由光谱分析和化学转化确定为1-氧代-2R, 3S-二甲基-4R-(3-甲氧基-4-羟基苯)-6,7-次甲二氧基四氢萘. 其余五个为已知物, 分别鉴定为恩施辛(2,enshicine),isoschizandrolic acid(3), 去氧五味子素, β-谷甾醇和硬脂酸, 其中3系首次自天然界获得.     

神农架地区五味子科植物成分的研究 Ⅰ.铁箍散茎和根的化学成分研究

从铁箍散的茎和根中分得六个化合物.其中一个是新化合物,命名为表恩施辛(1,epienshicine),在体外具有抗癌活性.其结构由光谱分析和化学转化确定为1-氧代-2R,3S-二甲基-4R-(3-甲氧基-4-羟基苯)-6,7-次甲二氧基四氢萘.其余五个为已知物,分别鉴定为恩施辛(2,enshicine),isoschizandrolic acid(3),去氧五味子素,β-谷甾醇和硬脂酸,其中3系首次自天然界获得     

华中五味子的研究——Ⅳ.安五酸和dl-安五脂素的结构及d-表加巴辛的绝对构型

从华中五味子中分得两个新化合物:安五酸(1a)和dl-安五脂素(2a),其结构经光谱分析和化学转化分别证明为3a-羟基-羊毛甾-8,24-二烯-26-酸和dl-2S,3R-二甲基-1-(3,4-次甲二氧苯基)-4-(3-甲氧基-4-羟苯基)丁烷。同时分得已知木脂素(3b)。通过圆二色散谱比较,证明d-表加巴辛(3a)的绝对构型为2S, 5S-二(3,4-次甲二氧苯基)-3R,4S-二甲基四氢呋喃。     

五脂酮A, B和Butyryl Binankadsurin A的分离与结构

从采自广西柳州地区融水县的一种南五味子(Kadsurasp.)种子中分得三个已知化合物---binankadsurinA(1),acetylbinankadsurinA(2),angeloylbinankadsurinA(3)及三个新化合物---五脂酮(schisanlignone)A(4),B(5),butyrylbinankadsurinA(6)。它们的结构由光谱分析和化学转化而阐明。1系首次从自然界分得。在抗癌药理筛选中,4与5在体外都对白血病P-388细胞有抑制作用。其IC~5~0分别为10和40μg/mL。     

长苞铁杉中木脂素类化学成分研究（英文）

从中国特有植物长苞铁杉心材中分离纯化得到1个新的苄基呋喃酮衍生物(1), 2个新的木脂素(2, 3),以及19个已知的木脂素类化合物,新化合物的结构通过HR-ESI-MS,1DNMR,2DNMR,CD等光谱技术分别鉴定为3-(4'-羟基-3'-甲氧基苄基)-2(5H)-呋喃酮(1),(8S,8'S)-3,3'-二甲氧基木脂-4,4',9,9'-四醇-9-乙酸酯(2),(7'R,8S,8'S)-3',5-二甲氧基-2,7'-环木脂-4,4',9'-三醇-9-酸丁酯.噻唑蓝(MTT)法测试显示新化合物对三种肿瘤细胞(A172,SHSY5Y,Hela)均未表现出明显毒性.斑马鱼肠胃蠕动活性测试显示,化合物3在8和24μmol/L浓度下对斑马鱼肠胃蠕动有明显的促进作用.     

粤北产五味子科植物风沙藤的化学成分研究(II)

本文继续报道从粤北所采集的五味子科植物风沙藤(Schisandra viridis A. C.Sm)根和茎中分得的另外三个木脂素类新化合物, 即五味子酯(schisantherin)K,五脂酮(Schisanlignone)E和异安五脂素(isoanwulignan)。通过光谱分析和化学转变, 确定了它们的结构和构型。     

粤北产五味子科植物风沙藤的化学成分研究(II)

本文继续报道从粤北所采集的五味子科植物风沙藤(Schisandra viridis A. C.Sm)根和茎中分得的另外三个木脂素类新化合物, 即五味子酯(schisantherin)K,五脂酮(Schisanlignone)E和异安五脂素(isoanwulignan)。通过光谱分析和化学转变, 确定了它们的结构和构型。     

粤北产五味子科植物风沙藤的化学成分研究(Ⅱ)

本文继续报道从粤北所采集的五味子科植物风沙藤(Schisandra viridis A.C Sm)的根和茎中分得的另外三个木脂素类新化合物,即五味子酯(schisantherin)K(1),五脂酮(schisanlignone)E(2)和异安五脂素(isoanwulignan)(3)。通过光谱分析和化学转变,确定了它们的结构和构型。     

五味子酯J和五内酯F的分离与结构

从长梗南五味子(Kadsura Lorgipedunculata Finet.et Gagnep)种子中分得2个新化合物: 五味子酯(schisantherin)J(1)和五内酯(schisanlactone)F(2); 4个已知物: 五内酯(Schisanlactone)A、schizandronic acid、表安五酸(epianwuweizic acid)和二甲基去当归酰五味子酯F, 抗癌药理筛选表明, 在体外2对白血病P-388细胞有明显抑制作用。     

Isolation of lignan glucosides and neolignan sulfate from the leaves of Glochidion zeylanicum (Gaertn) A. Juss

Six lignan and neolignan derivatives (1-6) were isolated from the n-BuOH-soluble fraction of a MeOH extract of the leaves of Glochidion zeylanicum. On the basis of spectral data, their structures were elucidated to be (+)-isolarisiresinol 3a-O-beta-glucopyranoside (1), dihydrodehydrodiconiferyl alcohol 4-, 9- and 9'-O-beta-D-glucopyranosides (2-4, respectively), (+)-isolarisiresinol 2a-O-beta-D-glucopyranoside (5), and dihydrodehydrodiconiferyl alcohol 9-O-sulfate (6), and 5 and 6 were new compounds.     

Studies on the constituents of Swertia japonica Makino II. On the structures of new glycosides

Two new secoiridoid glycosides, swertiajaposide A (1) and swertiajaposide B (2), a new unsaturated alco-hol glycoside, 3-butenyl 6'-O-alpha-L-arabinopyranosyl-beta-D-glucopyranoside (3), and a new lignan glycoside, 7R,7'R,8S,8'S-(+)-neo-olivil-4-O-beta-D-glucopyranoside (4), were isolated together with six known compounds from the whole plants of Swertia japonica Makino. The structures of the new compounds were elucidated on the basis of chemical and spectroscopic evidence.     

Chemistry of the podocarpaceae—III A new lignan, seco-isolariciresinol and further constituents of the heartwood of Podocarpus spicatus

A new lignan for which the name seco-isolariciresinol is proposed, has been isolated from the heartwood of Podocarpus spicatus. The structure has been shown to be 2:3-bis(4′-hydroxy-3′- methoxybenzyl)-butan-1:4-diol (II, R = H), and confirmed by an absolute synthesis from (−)-matairesinol (I, R = H). A further examination of the extractives of the heartwood has resulted in the isolation of the minor constituents, (+)-taxifolin, (+)-aromadendrin, kaempferol and sequoyitol, in addition to the previously reported compounds, matairesinol, -conidendrin, quercetin, genistein and podospicatin.     

Larrealignans A and B, novel lignan glycosides from the aerial parts of Larrea tridentata

Two new lignan glycosides, named larrealignans A (1) and B (2), and a known lignan (3) were isolated from the aerial parts of Larrea tridentata (Zygophyllaceae). The structures of 1 and 2 were determined on the basis of spectroscopic analysis and the results of hydrolytic cleavage. The isolated compounds (1-3) and aglycones (1a, 2a) of 1 and 2 were evaluated for their cytotoxic activities against HL-60 human leukemia cells.     

A new aryltetrahydronaphthalene lignan from Epimedium brevicornum

A new aryltetrahydronaphthalene lignan,(+)-cycloolivil formaldehyde condensate(1),was isolated from the whole plants of Epimedium brevicornum(Berberidaceae).Its structure was elucidated on the basis of MS,1D and 2D NMR techniques.     

New constituents from the heartwood of Picea morrisonicola HAYATA

Three new constituents, including a p-menthane type monoterpene, trans-p-menthane-7,8,9-triol (1), an aromatic, 2,6-dihydroxy-3,4-dimethylbenzoic acid methyl ester (2), and a lignan, (+)-morrisonicolanin (3), were isolated from the low polar layer of heartwood extracts of Picea morrisonicola, and their structures were elucidated on the basis of spectroscopic analysis. Of these compounds identified, 1 was obtained as its diacetylated derivative 1a, and 2 was the chemical entity first isolated from a natural source.     

A New Lignan from Gymnotheca involucrata

Chemistry of Natural Compounds - A new lignan, named gymnotheinvolin (1), and three known compounds (2–4) were isolated from the Chinese medicinal plant Gymnotheca involucrata. The structure...     

Phenolic Constituents from Platycodon grandiflorum Root and Their Anti-Inflammatory Activity

Six lignols (1–6), including two new compounds (+)-(7R,8R)-palmitoyl alatusol D (1) and (+)-(7R,8R)-linoleyl alatusol D (2), along with four phenolics (7–10), a neolignan (11), three alkyl aryl ether-type lignans (12–14), two furofuran-type lignans (15–16), three benzofuran-type lignans (17–19), a tetrahydrofuran-type lignan (20), and a dibenzylbutane-type lignan (21) were isolated from the ethyl acetate-soluble fraction of the methanol extract of Platycodon grandiflorum (Jacq.) A. DC. root. The chemical structures of the obtained compounds were elucidated via high-resolution mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy analyses. The obtained spectroscopic data agreed well with literature. Among the isolated compounds, eighteen (1–7 and 11–21) were isolated from P. grandiflorum and the Campanulaceae family for the first time. This is the first report on lignol and lignan components of P. grandiflorum. The anti-inflammatory effects of the isolated compounds were examined in terms of their ability to inhibit the production of pro-inflammatory cytokines IL-6, IL-12 p40, and TNF-α in lipopolysaccharide-stimulated murine RAW264.7 macrophage cells. Nine compounds (4–6, 12, and 15–19) exhibited inhibitory effects on IL-12 p40 production, eleven compounds (1–6, 12, 15–17, and 19) exhibited inhibitory activity on IL-6 production, and eleven compounds (1–6 and 15–19) exhibited inhibitory effects against TNF-α. These results warrant further investigation into the potential anti-inflammatory activity and general benefits of the phenolic constituents of P. grandiflorum root.     

A New Lignan and Four New Lignan Glycosides from Mananthes patentiflora

A new lignan, 5‐hydroxyjusticidin A (= 9‐(1,3‐benzodioxol‐5‐yl)‐5‐hydroxy‐4,6,7‐trimethoxynaphtho[2,3‐c]furan‐1(3H)‐one; 1 ), and four new diphyllin‐type lignan glycosides, mananthosides C–F ( 2 – 5 ), containing glucosyl (Glc), arabinosyl (Ara), galactosyl (Gal), and/or apiosyl residues, have been isolated from Mananthes patentiflora, together with five known compounds. Their structures and configurations were elucidated by in‐depth 1D‐ and 2D‐NMR experiments, as well as MS analysis.