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Photos and quantified results of 4-(phenylsulfanyl)butan-2-one on the pigmentation levels of the zebrafish system. PTU (200 µM) and arbutin (100 and 20,000 µM) were the positive control groups. Test compounds were dissolved in 1.0% DMSO, and then added to the embryo medium from 9 to 57 hpf (total 48 h exposure) at 28.5 °C. (* p < 0.01, compared to the control group).
