Three oxanthrones from Aloe littoralis |
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| Affiliation: | 1. Department of Chemistry, Addis Ababa University, P.O. Box 30270, Addis Ababa, Ethiopia;2. Department of Botany, Rand Afrikaans University, P.O. Box 524, Johannesburg, 2000, South Africa;3. Institut für Organische Chemie der Universität, Karlstr. 23, D-80333 München, Germany;1. College of Science, Northwest A&F University, 22 Xinong Road, Shaanxi, Yangling, 712100, China;2. Department of Natural Products Chemistry, School of Pharmacy Fudan University, 826 Zhangheng Road, Shanghai 201203, China;1. Chinese Center for Chirality, College of Pharmacy, Hebei University, Baoding 071002, China;2. The State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, CAS, Kunming 650204, China;1. Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China;2. State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, China;3. State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, China;1. Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Mexico City, Mexico;2. Maimonides Biomedical Research Institute of Córdoba, Reina Sofía University Hospital, Department of Cell Biology, Physiology and Immunology, University of Córdoba, Avenida Menéndez Pidal s/n, 14004 Córdoba, Spain;3. Universidad Autónoma Metropolitana Unidad Xochimilco, Calzada del Hueso 1100, Mexico City 04960, Mexico;1. Institute of Pharmaceutical Biology and Biotechnology, Heinrich Heine University Duesseldorf, Universitaetsstrasse 1, Geb. 26.23, 40225 Duesseldorf, Germany;2. Institute of Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Duesseldorf, Universitaetsstrasse 1, Geb. 26.23, 40225 Duesseldorf, Germany;3. State Key Laboratory of Natural and Biomimetic Drugs, Peking University, 100191 Beijing, PR China;4. Department of Organic Chemistry, University of Debrecen, POB 20, 4010 Debrecen, Hungary |
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| Abstract: | The leaf exudate of Aloe littoralis yielded, in addition to the known 10-hydroxyaloin B, two new C-glucoside oxanthrones namely 10-hydroxy-15-O-(2R,3S-nilyl)(6′-O-acetyl)aloin B (littoraloin) and 10-hydroxy-15-O-(2R,3S- nilyl)aloin B (deacetyllittoraloin). Their structures were determined by spectroscopic methods as well as by conversion to the known 10-hydroxyaloin B and nilic acid. |
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