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As part of our ongoing studies on the synthesis of bioactive coumarin compounds, we synthesized a series of new coumarin‐fused 1,4‐thiazepines using a simple method. The biological activity of target compounds along with 3‐(2‐hydroxybenzylidene)chroman‐2,4‐dione intermediates was screened by evaluation of their antioxidant and cytotoxic activities. The antioxidant activity was assessed using two methods,...
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