Xanthane sesquiterpenoids from the roots and flowers of Xanthium cavanillesii |
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Authors: | Cristina Olivaro Vanesa Rostan Daniela Bandera |
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Institution: | 1. Facultad de Química, Departamento de Química Orgánica, UdelaR, Montevideo, Uruguay;2. Espacio de Ciencia y Tecnología Química, Centro Universitario de Tacuarembó, UdelaR, Tacuarembó, Uruguay |
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Abstract: | The sesquiterpene lactones xanthanodiene, 4-epi-xanthanol, 4-epi-isoxanthanol, and 4-epi-xanthinin, as well as the xanthanolide derivative 4-oxo-bedfordia acid were isolated from the chloroform extracts of roots and flowers of Xanthium cavanillesii Schouw. The identities of these compounds were corroborated through comparison of their spectroscopic data, including IR, MS, and 1H and 13C NMR assignments, with literature reports. In addition, the structural characterization of 4-oxo-bedfordia acid was revisited and a comprehensive spectroscopic study of the compound is presented. This is to our knowledge the first phytochemical investigation of the roots of X. cavanillesii, and of flowers in the whole Xanthium genus. |
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Keywords: | Abrojo 4-Oxo-bedfordia acid xanthane sesquiterpenoids xanthanolides Xanthium cavanillesii Schouw |
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