Using ClCCl, Cn1c(-c2cccc(N3CCC(NC(=O)OC(C)(C)C)CC3)c2)nc2ccccc21 to produce Cn1c(-c2cccc(N3CCC(N)CC3)c2)nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.