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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Calophyllum, Chromatography, Flavonoids, Glycosides, Kaempferols, Magnetic Resonance Spectroscopy, Mass Spectrometry, Plant Leaves, Plant Stems, Plants, Medicinal, Pyrans, Quercetin, Xanthenes.
user
Does [ Studies on flavonoids from stem and leaves of Calophyllum inophyllum ]? Context: To study the chemical constituents from the stems and leaves of Calophyllum inophyllum. The compounds were isolated by column chromatography on silica gel, Sephadex LH-20 and preparative TLC. Their structures were elucidated by chemical methods and NMR, MS spectroscopic data. Nine compounds were identified as 2-hydroxyxanthone (1), 4-hydroxyxanthone (2), 1, 5-dihydroxyxanthone (3), 1, 7-dihydroxyxanthone (4), 1, 3, 5-trihydroxy-2-methoxyxanthone (5), 6-deoxyjacareubin (6), amentoflavone (7), kaempferol-3-O-alpha-L-rhamnoside (8) and quercetin-3-O-alpha-L-rhamnoside (9).
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Compounds 8 and 9 were isolated from the genus Calophyllum and compounds 1, 2, 4-6 were isolated from this plant for the first time. Final Decision: yes