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We developed Wnt/β-catenin inhibitors by identifying 13 number of 3-arylethynyl-substituted pyrido[2,3,-b]pyrazine derivatives that were able to inhibit the Wnt/β-catenin signal pathway and cancer cell proliferation. In the optimization process, a series of 2,3,6-trisubstituted pyrido[2,3,-b]pyrazine core skeletons showed were shown to higher activity than 2,3,6-trisubstituted quinoxaline’s and thus...
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