Using CC1(C)COC2(CCc3c(c(=O)c4cccnc4n3-c3ccccc3)C2)OC1 to produce O=C1CCc2c(c(=O)c3cccnc3n2-c2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.