Ainsliatrimers A and B, the first two guaianolide trimers from Ainsliaea fulvioides.

[摘要]：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 I and II showed potent cytotoxicites against LOVO and CEM cell lines.

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