Using NC(=O)CCl, CCOC(=O)N1CCN(c2nc(C)nc3c2OCC(=O)N3)CC1 to produce CCOC(=O)N1CCN(c2nc(C)nc3c2OCC(=O)N3CC(N)=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.