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15 hasil
New benzoyl glucosides and cytotoxic pterosin sesquiterpenes from Pteris ensiformis Burm.
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Three new compounds: 2R,3R-pterosin L 3-O-beta-D-glucopyranoside (1), beta-D-xylopyranosyl(1-->2)-7-O-benzoyl-beta-D-glucopyranoside (2) and 4-O-benzoyl-beta-D-xylo-pyranosyl(1-->2)-7-O-benzoyl-beta-D-glucopyranoside (3), together with nine known compounds, were isolated from the ethyl acetate
New pterosin sesquiterpenes and antitubercular constituents from Pteris ensiformis.
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Two new pterosin sesquiterpenes, (2S)-13-hydroxypterosin A (1) and (2S,3S)-12-hydroxypterosin Q (2), were isolated from the whole plants of Pteris ensiformis, together with six known compounds. The structures of 1 and 2 were determined through extensive 1D/2D-NMR and MS analyses. Compound 2
Cytotoxic pterosins from Pteris multifida roots against HCT116 human colon cancer cells.
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Two new pterosin glycosides, (2S,3S)-pterosin C 3-O-β-d-(4'-(E)-caffeoyl)-glucopyranoside (1) and (2S,3S)-pterosin C 3-O-β-d-(6'-(E)-p-coumaroyl)-glucopyranoside (2), were isolated from Pteris multifida (Pteridaceae) roots along with ten known pterosin compounds (3-12). The chemical structures of
Pterosins from Pteris multifida.
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A new C(14) pterosin sesquiterpenoid, named (2R)-pterosin P (1), and a new natural product, named dehydropterosin B (3), were isolated from the aerial parts of Pteris multifida Poir., along with nine known compounds (2, 4-11). By chiral HPLC, compounds 1 and 2 were isolated as a pair of enantiomeric
Two new pterosin dimers from Pteris mutifida Poir.
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Two new C₁₄ pterosin dimers, which are a pair of isomers named as bimutipterosins A (1) and B (2), were isolated from the whole plant of Pteris multifida. Their structures have been elucidated on the basis of NMR and MS data. From a biogenetic point of view, these compounds including a cyclobutane
Three novel pterosin dimers form Pteris obtusiloba
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Three novel pterosin dimmers, named as obtupterosin A (1), B (2) and C (3), together with eight known pterosins (4-11) were isolated from Pteris obtusiloba. Their structures were elucidated on the basis of ESI-MS, 1D and 2D NMR spectral data, CD, X-ray and literature comparisons. Compounds 1 and 2
Four New Pterosins from Pteris cretica and Their Cytotoxic Activities.
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Phytochemical investigation of the aerial parts of Pteris cretica led to the isolation and elucidation of nine pterosins, including four new pterosins, creticolacton A (1), 13-hydroxy-2(R),3(R)-pterosin L (2), creticoside A (3), and spelosin
Pterosin Sesquiterpenoids from Pteris cretica as Hypolipidemic Agents via Activating Liver X Receptors.
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Four new pterosin sesquiterpenoids (1-4), a new ent-kaurane diterpenoid (17), and 18 known compounds were isolated from the aerial parts of Pteris cretica L. The structures of the isolates were elucidated based on spectroscopic data analysis, and their absolute configurations were determined by
Chemical and biologically active constituents of Pteris multifida.
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A new compound, 4-caffeoyl quinic acid 5-O-methyl ether (2), together with 12 known compounds--identified as (2R,3R)-pterosin L 3-O-beta-D-glucopyrannoside (3), beta-sitosterol beta-D-glucopyranoside (4), apigenin 7-O-beta-D-glucopyranoside (5), luteolin 7-O-beta-D-glucopyranoside (6), sucrose (7),
[Studies on chemical constituents from Pteris multifida].
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OBJECTIVE
To investigate the chemical constituents of Pteris multifida.
METHODS
All compounds were isolated and purified by normal column chromatography, paper thin layer chromatography and sephadex chromatography. The chemical structures were mainly elucidated by ESI mass and NMR
[Quality standard study on Pteris multifida].
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The quality control method and standard were established to control the quality of Pteris multifida in this paper. The tests of water content, total ash, acid-unsoluble ash and ethanol-soluble extractives of P. multifida were carried out according to the methods recorded in appendix of Chinese
[Chemical constituents from Pteris multifida and cytotoxic activity].
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The materials were extracted by 95% ethanol, and the extracting solution was isolated by kinds of chromatographic columns including polyamide, MCI, preparative MPLC, and preparative HPLC. Eight diterpenes and two sesquiterpenes were isolated from the plant. On analysis of ESI-MS and NMR
Cytotoxic diterpenoids and sesquiterpenoids from Pteris multifida.
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Three new ent-kaurane diterpenoids, named pterokaurane M 1-M 3 ( 1- 3) and three new C 14 pterosin-sesquiterpenoids, named multifidoside A-C ( 4- 6), along with 18 known compounds, were isolated from the whole plants of Pteris multifida . The structures of 1- 6 were established using spectroscopic
Bovine enzootic haematuria from consumption of Pteris deflexa and Pteris plumula in northwestern Argentina.
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Bovine enzootic haematuria (BEH) is caused by prolonged ingestion of toxic principles of bracken fern, essentially by Pteridium spp. In northwestern Argentina, this disease has a great economic impact ant it is attributed a chronic consumption to Pteridium arachnoideum. This paper describes two
Survey of ferns and clinico-pathological studies on the field cases of Enzootic bovine haematuria in Himachal Pradesh, a north-western Himalayan state of India.
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Enzootic bovine haematuria (EBH) in cattle occurs in upland areas of the world. In India, the disease is present in isolated pockets in the Himalayas and in the Nilgiri Hills. The variation in the disease incidence has been attributed to different environmental conditions and animal rearing
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