| CPC A61K 31/7084 (2013.01) [A61K 35/00 (2013.01); A61K 45/06 (2013.01)] | 19 Claims | 

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               1. A method of treating a patient having cancer, comprising: 
              administering to a patient in need of said treating Compound No. 14, having the following structure: 
              ![]() or a pharmaceutically acceptable salt thereof, and 
                a checkpoint inhibitor, wherein the checkpoint inhibitor is an anti-PD1 antibody or an anti-PD-L1 antibody, and wherein administering Compound No. 14 and the checkpoint inhibitor provides a synergistic effect. 
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