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The Croton genus is known for its various biological properties, which inspired this study to investigate the anti-bacterial properties and chemodiversity of the essential oils of three Croton species: Croton blanchetianus, Croton jacobinensis, and Croton nepetifolius. The essential oils were characterised by gas chromatography (GC-MS) and demonstrated anti-bacterial activity against Staphylococcus aureus and Escherichia coli using the disc diffusion method. The essential oil composition of C. blanchetianus showed bicyclogermacrene (16.04%) and spathulenol (16.44%) as the main compounds. In C. jacobinensis, bicyclogermacrene (22.04%), caryophyllene (17.95%), and β-phellandrene (12.30%) were the most prevalent. Meanwhile, C. nepetifolius's essential oil consisted mainly of bicyclogermacrene (17.69%), caryophyllene (15.15%), and germacrene D (11.78%). The principal component analysis (PCA) results showed three distinct chemotypes for each Croton species, suggesting that they have well-defined and unique chemical profiles. Interestingly, the three Croton species demonstrated activity only against Staphylococcus aureus bacteria.
Venâncio et al. (Wed,) studied this question.
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