Résumé
Objective: To investigate the chemical constituents in the whole herbs of Pothos chinensis. Methods: The chemical constituents were isolated and purified by various column chromatographic methods and preparative HPLC. Their structures were identified by physicochemical properties and spectral analyses. Results: Seventeen compounds were isolated from the methanol extract and identified as N-trans-cinnamoyltyramine (1), N-trans-p-coumaroyltyramine (2), N-cis-p-coumaroyltyramine (3), N-trans- feruloyltyramine (4), N-cis-feruloyltyramine (5), loliolide (6), dehydrovomifoliol (7), (3S, 5R, 8R, 9R)-5, 8-epoxy-6-megastigmene-3, 9-diol (8), (3R, 6R, 7E)-3-hydroxy-4, 7-megastigmadien-9-one (9), (3R)-4-[(2R, 4S)-2-hydroxy-2, 6, 6-trimethylcyclohexylidene]-3- buten-2-oneiol (10), 7-methoxycoumarine (11), imperatorin (12), 7-hydroxy-8-methoxycoumarin (13), 6-hydroxy-7-methoxycoumarin (14), indole-3-aldehyde (15), (-)-medioresinol (16), and daidzein (17). Conclusion: All the compounds are isolated from the plants in Pothos L. for the first time.
Résumé
Growth suitability as assessment indicators for medicinal plants cultivation was proposed based on chemical quality determination and ecological factors analysis by Maxent and ArcGIS model. Notopterygium incisum, an endangered Chinese medicinal plant, was analyzed as a case, its potential distribution areas at different suitability grade and regionalization map were formulated based on growth suitability theory. The results showed that the most suitable habitats is Sichuan province, and more than 60% of the most suitable areawas located in the western Sichuan such as Aba and Ganzi prefectures for N. incisum. The results indicated that habitat altitude, average air temperature in September, and vegetation types were the dominant factors contributing to the grade of plant growth, precipitation and slope were the major factors contributing to notopterol accumulation in its underground parts, while isoimperatorin in its underground parts was negatively corelated with precipitation and slope of its habitat. However, slope as a factor influencing chemical components seemed to be a pseudo corelationship. Therefore, there were distinguishing differences between growth suitability and quality suitability for medicinal plants, which was helpful to further research and practice of cultivation regionalization, wild resource monitoring and large-scale cultivation of traditional Chinese medicine plants.