Ainsliatrimers A (1) and B (2), the first two guaianolide-type sesquiterpene lactone trimers, together with one new structurally related sesquiterpene dimer ainsliadimer B (3), were isolated from the aerial part of Ainsliaea fulvioides. Their structures were elucidated by spectroscopic techniques, including X-ray crystal diffraction. Both 1 and 2 showed potent cytotoxicites against LOVO and CEM cell lines.
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Wang et al. (2008) studied this question.
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