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Labdane diterpenoids from Leonurus sibiricus.
Six new labdane diterpenoids were isolated from the leaves of Leonurus sibiricus and the absolute configurations of 1, 2, 5, and 6 were established by X-ray crystallographic analyses, and leosibirone A was shown to be an artifact of the isolation process. Expand
Triterpenoids and flavonoids from Cecropia schreberiana Miq. (Urticaceae).
The occurrence of flavanolignans within the family Urticaceae supports the likelihood that such compounds are more common within the class Magnoliopsida than previously thought. Expand
Isolation of three sesquiterpene lactones from the roots of Cichorium glandulosum Boiss. et Huet. by high-speed counter-current chromatography.
Three sesquiterpene lactones were successfully purified from the ethyl acetate extract of the roots of the traditional Uyghur medicinal plant Cichorium glandulosum Boiss by high-speed counter-current chromatography. Expand
New spermidine alkaloids from Capparis spinosa roots
Three new spermidine alkaloids were isolated from the roots of Capparis spinosa and their structures were established on the basis of spectroscopic analysis, including 1D and 2D NMR experiments. Expand
Preparative isolation of guaipyridine sesquiterpene alkaloid from Artemisia rupestris L. flowers using high-speed counter-current chromatography.
A novel and strange guaipyridine sesquiterpene alkaloid with a carboxyl group named rupestine was purified successfully from the total alkaloids extracted from the flowers by high-speed counter-current chromatography (HSCCC). Expand
Antileishmanial Germacranolides from Calea zacatechichi.
Phytochemical study of the leaves and stems of Calea zacatechichi Schl. (Asteraceae) led to the isolation of a series of six germacranolides (1-6) with significant antileishmanial activity. TheExpand
Application of Preparative High-Speed Countercurrent Chromatography for Separation of Elatine from Delphinium shawurense
Preparative separation of elatine in Delphinium shawurense was achieved for the first time using high speed countercurrent chromatography (HSCCC) with an approximately 95% recovery. Expand
New Guaipyridine Sesquiterpene Alkaloids from Artemisia rupestris L.
Three new guaipyridine sesquiterpene alkaloids, rupestine A, B, C (1-3, resp.), and the new norsesquiterpne alkaloid rupestine D (4) were obtained from the flowers of Artemisia rupestris L. TheirExpand
Labdane diterpenoids from Leonotis leonurus.
Three known and eight hitherto unknown leoleorins D-J and 16-epi-leoleorin F, labdane diterpenoids, were isolated from leaves of Leonotis leonurus showing inhibition in excess of 50% at various CNS receptors. Expand