(R)-n-(1-(7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro-1h-purin-8-yl)piperidin-3-yl)-2,2,2-trifluoroacetamide