Using Cn1cnc(Nc2ncc(Cl)c(NC3CC4CN(C(=O)OC(C)(C)C)CC4C3)n2)c1 to produce Cn1cnc(Nc2ncc(Cl)c(NC3CC4CNCC4C3)n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.