AB8000000 Acetamide, N-(4-((1,3-dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)methyl)phenyl)- N-(4-((1,3-Dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)methyl)phenyl)acetamide