6-bromo-2-[(4-methyl-1H-benzo[d]imidazol-1-yl)methyl]-3-phenyl-4H-chromen-4-one

6-bromo-2-[(6-chloro-9H-purin-9-yl)methyl]-3-phenyl-4H-chromen-4-one

2-[(9H-Purin-6-ylthio)methyl]-6-bromo-3-phenyl-4H-chromen-4-one

2-((4-Amino-1H-pyrazolo[3,4-d]pyrimidin-1-yl)methyl)-6-bromo-3-phenyl-4H-chromen-4-one

7-[(6-Bromo-4-oxo-3-phenyl-4H-chromen-2-yl)methyl]-1,3-dimethyl-1H-purine-2,6(3H,7H)-dione