Using Cc1nn(C(C)c2cc(Cl)c(C#N)c3c2OCCN(C(=O)OC(C)(C)C)C3)c2ncnc(N)c12 to produce Cc1nn(C(C)c2cc(Cl)c(C#N)c3c2OCCNC3)c2ncnc(N)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.