The SMILES Cn1cnc2c1c(=O)[nH]c(=O)n2C is not metabolized by CYP2C9.
The {#molecule |!}{SMILES__description} {SMILES#} is {CYP2C9_Substrate#not &NULL}{CYP2C9_Substrate__names__verb}.
3,7-dimethylpurine-2,6-dione