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Sesquiterpene lactones of Calea zacatechichi and C. urticifolia

1980; Elsevier BV; Volume: 19; Issue: 4 Linguagem: Inglês

10.1016/0031-9422(80)87022-1

1873-3700

Werner Herz, Narendra Kumar,

Natural product bioactivities and synthesis

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.