(R)-7-(But-2-yn-1-yl)-3-methyl-8-(3-(5-methyl-1,3-dioxoisoindolin-2-yl)piperidin-1-yl)-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione
(R)-7-(But-2-yn-1-yl)-3-methyl-8-(3-(5-methyl-1,3-dioxoisoindolin-2-yl)piperidin-1-yl)-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione