The molecule with the SMILES Cn1cnc2c1c(=O)[nH]c(=O)n2C is not a substrate for CYP P450 2C9.
The molecule with the {SMILES__description} {#representation of |!}{SMILES#} is {CYP2C9_Substrate#not &NULL}a {CYP2C9_Substrate__names__noun}.
3,7-dimethylpurine-2,6-dione