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In this work, we designed and synthesized 3-cyano-2-oxo-2H-chromen-7-yl acrylate as a simple and effective probe 1, which is capable of detecting cysteine (Cys) over other biothiols, such as homocysteine and glutathione. Remarkably, with the addition of cysteine, the 125-fold increase in fluorescence intensity of probe 1 was observed at 450 nm with excitation at 413 nm and 5 min incubation time. Furthermore,...
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