2-methyl-1,7-diphenylpurin-6-one

1-benzyl-2-methyl-7-phenylpurin-6-one

1-(furan-2-ylmethyl)-2-methyl-7-phenylpurin-6-one

2-methyl-7-phenyl-1-pyridin-3-ylpurin-6-one

2-methyl-7-phenyl-1-(3,4,5-trimethoxyphenyl)purin-6-one