label: (R)-8-(3-hydroxypiperidine-1-yl)-7-(but-2-yn-1-yl)-1-((5-fluorobenzo(d)thiazol-2-yl)methyl)-3-methyl-1H-purine-2,6-(3H, 7H)-dione
label_lc: (r)-8-(3-hydroxypiperidine-1-yl)-7-(but-2-yn-1-yl)-1-((5-fluorobenzo(d)thiazol-2-yl)methyl)-3-methyl-1h-purine-2,6-(3h, 7h)-dione