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2 results on '"Stemonoceae"'

1. Studies on bioactive components from Chinese medicinal plants

Author

Ren-Sheng Xu, Zong-Jian Tang, Sheng-Chu Feng, Yi-Ping Yang, Wen-Han Lin, Qiong-Xing Zhong, and Yi Zhong

Subjects
Mallotus anomalus, Euphorbiaceae, Stemona parviflora, Stemonoceae, ent-kourane, rosane, delabradane diterpenoids, mayatansinoid, stemona alkaloids, 2D NMR techniques, Microbiology, QR1-502, Infectious and parasitic diseases, RC109-216
Abstract

Several novel bioactive components isolated from Chinese medicinal plants will be presented. These include novel maytansinoid tumor, inhibitors, some new ent-kaurane and rosane diterpenoids from Mallotus anomalus Meer et Chun (Euphorbiaceae), as well asnovel insecticide, stemona alkaloids from Stemona parviflora C. H. Wright (Stemonaceae). Both are native plants of Hainan island, Chine. 2D NMR techniques such as mono and hetero-COSY, NOESY, COLOC as well as H-NMR line broadening effect were utilized for structure elucidation. The separation techniques, struture elucidations and bioassay results will be reported.

Published
1991
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2. Studies on bioactive components from Chinese medicinal plants

Author

Qiong-Xing Zhong, Yi Zhong, Wen-Han Lin, Yi-Ping Yang, Sheng-Chu Feng, Ren-Sheng Xu, and Zong-Jian Tang

Subjects
stemona alkaloids, Microbiology (medical), Insecticides, 2D NMR techniques, lcsh:Arctic medicine. Tropical medicine, lcsh:RC955-962, lcsh:QR1-502, Molecular Conformation, delabradane diterpenoids, Biology, ent-kourane, complex mixtures, lcsh:Microbiology, Molecular conformation, Mallotus anomalus, chemistry.chemical_compound, Ginseng, Mice, Stemonoceae, Triterpenoid, Animals, Medicinal plants, Triterpenoid saponin, chemistry.chemical_classification, Natural product, Traditional medicine, Glycyrrhiza uralensis, Euphorbiaceae, Neoplasms, Experimental, biology.organism_classification, Antineoplastic Agents, Phytogenic, mayatansinoid, carbohydrates (lipids), Antitussive Agents, Stemona parviflora, chemistry, rosane, Drugs, Chinese Herbal
Abstract

Saponins are oligoglycosides with spirostane, steroid or triterpenoid aglycones as their genins, which constitute an important kind of natural product. Some of them exhibit prominent bioactivities, such as the saponins from Panax ginseng and Glycyrrhiza uralensis. Because of their high polarity and relatively complicated structures, it was time- and sample-consuming work to purify and identify them before the 1980’s. In the past decade, the continuing development of various advanced chromatographic materials and spectroscopic methods have made it possible to isolate and determine the structures of certain minor saponins ocurring only in small quantities in a short time.

Published
1991

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