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A new indole alkaloid, named donasine, has been isolated from the rhizomes of Arundo donax L. Its structure was determined by X-ray crystallographic analysis and spectral methods. The primary pharmacological test showed that the compound has an action of reducing fever.
The cell suspension cultures, established from the friable callus which was risen from the nodal segments of Dioscorea bulbifera L. in Murashige-Skoog (MS) medium supplemented with indole-3-butryic acid (20 mg L - 1 ), was examined for cell growth in MS medium fed with cholesterol (50 mg L - 1...
Chemical studies on the roots of Fraxinus rhynchophylla led to the isolation of fraxisecoside ( 1 ), a novel coumarin-secoiridoid hybrid glycoside, namely, fraxetin-8- O -11'-methyl-oleosidyl-(7' → 6'')-β- d -glucopyranoside and 14 known compounds. Their structures were elucidated based on...
Four new oplopane and guaiane type sesquiterpenoids ( 1 - 3 ), and a monoterpenoid ( 4 ) together with three known monoterpenoids ( 5 - 7 ), have been isolated from the roots of Ligularia narynensis . The structures of 1 - 4 were elucidated as 3β,4-diacetoxy-8 -(2-methylbutyryloxy)-9...
Three new acylphloroglucinol glycosides, namely pyrafortunosides A ( 1 ), B ( 2 ) and C ( 3 ), together with three known glycosides ( 4 - 6 ), were isolated from the fruits of Pyracantha fortuneana (Maxim.) Li. Their sructures were established to be 2,4,6-trihydroxy-acetophenone-6- O - - l...
Two new cycloartane glycosides were isolated from the whole herbs of Camptosorus sibiricus Rupr. By means of chemical and spectroscopic methods (IR, 1D and 2D NMR, HRMS, ESI MS), the structures were established as (24 R )-3β, 7β, 24, 25-tetrahydroxycycloartane 3- O -β- d -glucopyranosyl-24- O...
Pseudolaric acid-B (PLAB), a diterpene acid, was isolated from the root and trunk barks of Pseudolarix kaempferi . It has shown antifungal and anti-fertility effects and cytotoxic activities in previous studies. Our goals are to study the effects of PLAB on cell proliferation and Smad signal...
The metatrophic fungus Paecilomyces sp. (Tree1-7) was isolated from an estuarine mangrove from the Taiwan Strait. The methanol extract of the fungal mycelium exhibited cytotoxicity against hepG2. Paeciloxanthone ( 1 ), a new xanthone, and the known compounds emodin ( 2 ) and chrysophanol ( 3 ),...
By the guidance of bioassay, one new cytotoxic triterpenoid saponin, 3- O -β- d -galactopyranosyl-(1 → 2)-β- d -glucuronopyranosyl quillaic acid 28- O -β- d -glucopyranosyl-(1 → 3)-β- d -xylopyranosyl-(1 → 4)- - l -rhamnopyranosyl-(1 → 2)-β- d -fucopyranosyl-(1 → 4)-β- d...
Two new diterpenes and ent -15 -hydroxykaur-16- en -19-oic acid 11,12-acetonide (3) , together with 23 known compounds were isolated from the dried aerial parts of Nouelia insignis Franch. The structures of new compounds were determined to be ent -14β,15 -dihydroxykaur-16- en -19-oic acid (1) ,...
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