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Pteridines are an important class of heterocyclic compounds with diverse biological activities. Here, we report a series of pteridin-7(8H)-one derivatives and their antiproliferative activities toward MKN-45, MGC-803, EC-109, and H1650. Structure-activity relationship studies showed that compound 12 exerted the most potent antiproliferative activity against MKN-45 and MGC-803 with the IC50 values...
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