Citrus hystrix DC leaves powder obtained from Khaolaor Company (Samut Prakan, Thailand) was macerated in three different solvents sequentially, as previously described (Buakaew et al., 2021a (link),b (link)). Crude hexane, crude ethyl acetate, and crude ethanol extracts were obtained. citronellol, the active compound was identified from C. hystrix leaves extract (Buakaew et al., 2021a (link),b (link)). For in vitro experiments, citronellol was purchased from Sigma-Aldrich Company (St. Louis, MO, United States). They were stored at 4°C for future experiments.
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