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A series of 2(3H)‐thiazole thiones 3–5 was synthesized and evaluated for tyrosinase inhibition and DPPH radical scavenging activities. Among them, 3‐methyl‐4‐phenyl‐2(3H)‐thiazole thione (4a) showed good tyrosinase inhibitory activity, even better than that of the well‐known tyrosinase inhibitor, namely, kojic acid. From the structure–activity point of view, although it was found that the phenolic...
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