Sesquiterpene lactones with antibacterial activity from Tanacetum densum subsp. sivasicum
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The aerial parts of Tanacetum densum subsp. sivasicum yielded, in addition to known compounds, a new sesquiterpene lactone, sivasinolide which showed antibacterial activity against Bacillus subtilis and Klebsiella pneumoniae. The structures were elucidated by spectral methods. Some sesquiterpene lactones were evaluated for their cytotoxic activity. © 1992.