Using COC(=O)c1ccc2nc(C)n(Cc3ccc(N(C)C(=O)OC(C)(C)C)cc3Cl)c2n1 to produce CNc1ccc(Cn2c(C)nc3ccc(C(=O)OC)nc32)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.