New flavans isolated from the leaves and stems of Cratylia mollis (Leguminosae) |
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| Institution: | 1. Departamento de Ciências Exatas e Naturais, Universidade Estadual do Sudoeste da Bahia, 45700-000 Itapetinga, BA, Brazil;2. Instituto de Química, Universidade Federal da Bahia, 40170-290 Salvador, BA, Brazil;3. Faculdade de Farmácia, Universidade Federal da Bahia, 40170-290 Salvador, BA, Brazil;4. Instituto Federal da Bahia, Campus Porto Seguro, 45810-000 Porto Seguro, BA, Brazil;5. Departamento de Ciências Exatas, Universidade Estadual de Feira de Santana, 44031-460 Feira de Santana, BA, Brazil;1. Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan;2. Department of Geology, University of Swabi, Anbar 23561, Khyber Pakhtunkhwa, Pakistan;3. Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan;4. Department of Chemistry, University of Malakand, Chakdara, Dir (L), Pakistan;5. Department of Chemistry, Kohat University of Science and Technology, Kohat 26000, Pakistan;6. Department of Biotechnology, Sardar Bahadur Khan Women University, Quetta, Pakistan;1. Institute of Materia Medica, Shandong Academy of Medical Sciences, Jinan, Shandong 250062, PR China;2. School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, Jinan, Shandong 250062, PR China;1. Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | Cratylia mollis Mart ex. Benth is a species belonging to the Leguminosae family that exists throughout South America, and it is one of the most abundant plants in northeastern Brazil, especially in the semiarid region. This plant is popularly known as “camaratu” and “camaratuba”, and the leaves and stems of this species are used as a substitute for cattle's alimentation during the dry season. The chemical investigation of the methanolic extract from leaves and stems of C. mollis led to the isolation of new flavans named 4,2′,3′-trihydroxy-4′-methoxy-6,7-(methylenedioxy) isoflavan, 7,2′-dihydroxy-6-methoxyflavan, 7,3′-dihydroxy-6,2′-dimethoxyflavan, 7-hydroxy-6-methoxyflavan, 2′-hydroxy-6,7-(methylenedioxy) flavan, 2R*,3S*-7,2′-dihydroxy-6-methoxy-flavan-3-ol, and 2R*,3S*-7,3-dihydroxy-6,2′-dimethoxyflavan-3-ol and an unusual flavan (11H-benzofuro3,2-b]1] benzopyran-2-methoxy,3-hydroxy,5a,10a-dihydro) named (3R*,2R*)-3-O-2′-7-hydroxy-6-methoxyflavan. The structures of the new compounds were determined using spectroscopic methods. |
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| Keywords: | Leguminosae Flavan Flavan-3-ol |
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