Using COCCN1CCN(N(C(=O)OC(C)(C)C)C(=O)c2cnc(-c3ccccc3)nc2)CC1 to produce COCCN1CCN(NC(=O)c2cnc(-c3ccccc3)nc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.