2-Phenyl-3-hydroxy-4(1H)-quinolinones can be considered as aza-analogues of flavones, compounds which are known for the wide-range of their biological activity. These quinolinones were studied as inhibitors of topoisomerase, gyrase and IMPDH. They were tested for anticancer activity in-vitro and were also shown to possess immunosuppressive properties. This review is the first summarizing the synthesis and activity of the mentioned quinolinones.
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Hradil et al. (2009) studied this question.
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