Sesquiterpene lactones of Calea zacatechichi and C. urticifolia |
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Authors: | Werner Herz Narendra Kumar |
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Affiliation: | Department of Chemistry, The Florida State University, Tallahassee, FL 32306, U.S.A. |
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Abstract: | Calea zacatechichi yielded the sesquiterpene lactone zexbrevin and a new analog, several analogs of neurolenin B including calein A, two analogs of budlein A and the flavones acacetin and O-methylacacetin. Calea urticifolia contained additional analogs of neurolenin B as well as a series of epoxidation products. Structures were established by spectrometric techniques. The results are contrasted with previous findings. |
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Keywords: | Compositae Heliantheae Galinsoginae sesquiterpene lactones heliangolides flavones. |
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