A new alkenylphenol, 2-hydroxyl-6-(14'Z -nonadecenyl)benzoic acid (1), was isolated from the ethanolic extract of Vietnamese stingless bee propolis Trigona minor (Meliponini, Apidae), together with two known compounds (2 and 3). Their chemical structures were determined by extensive NMR spectroscopic analysis. All compounds were tested for preferential cytotoxicity against the PANC-1 human pancreatic cell line under nutrition-deprived conditions (NDM). Compound 1 exhibited the strongest preferential cytotoxicity, with a PC50 value of 2.4 μM.
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