Using CCCC1C(=O)N(Cc2ccc3c(N)ncnc3c2)C(C)CN1C(=O)OC(C)(C)C to produce CCCC1NCC(C)N(Cc2ccc3c(N)ncnc3c2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.