Journal
NATURAL PRODUCT RESEARCH
Volume 37, Issue 5, Pages 693-701Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2022.2079123
Keywords
Centaurothamnus maximus; Asteraceae; sesquiterpene lactone; antibacterial; antifungal
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A new sesquiterpene lactone, along with twenty-one known compounds, were identified from the aerial parts of Centaurothamnus maximus. The isolated compounds showed promising antibacterial and antifungal activities.
A new sesquiterpene lactone, 3 beta,10 alpha-dihydroxy-10 beta-(hydroxy-methyl)-8 alpha-(4-hyd roxymethacrylate)-1 alpha H,5 alpha H,6 beta H,7 alpha H-guai-4(15), 11(13)-dien-6,12-olide (1), along with twenty-one known compounds, were identified from the aerial parts of Centaurothamnus maximus. The structures of the isolated compounds were elucidated on the basis of spectroscopic evidences and correlated with known compounds. Compounds (2, 3, 5-13 and 15-22) were identified from C. maximus for the first time. Antibacterial and antifungal activities of the isolated compounds were tested using the agar disc diffusion method. Compounds that demon-strated promising antimicrobial activity were evaluated for their minimum inhibitory concentration (MIC). The results showed that compounds 3 and 7 were the most effective antibacterial compounds against B. subtilis ATCC 6633, S. aureus ATCC 25923 and S. pyogenes ATCC 27736, with MIC estimates between 8 and 32 mg/mL. In addition, compound 2 exhibited the strongest antifungal activity against C. albicans ATCC 14243 and C. krusei ATCC 14243 with MIC 8 mg/mL.
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