Sesquiterpene lactones from Parthenium tomentosum |
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| Authors: | Emma Maldonado Graciela O. Mendoza Jorge Cárdenas Alfredo Ortega |
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| Affiliation: | Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, México, D.F. |
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| Abstract: | Four populations of Parthenium tomentosum var. tomentosum were examinated. In addition to the known lactones, ivalbatine, acetyl ivalbatine, parthomentine, incanine and ligulatine C, three new pseudoguaianolides: 4-O-desacetyl ligulatine C; 1-dehydroperuvinine and parthoximentine were also isolated. Chemical and spectroscopic methods were used for their structural determination. |
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| Keywords: | Heliantheae Compositae sesquiterpene lactones pseudoguaianolides xanthanolides. |
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