Using Cn1nnc2ccc(C(=NNC(=O)OC(C)(C)C)c3ccc(Cl)cc3)cc21 to produce Cn1nnc2ccc(CNNc3ccc(Cl)cc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.