Using O=C1Nc2cccnc2Nc2ccccc21, COC(=O)CC(=O)CCl to produce COC(=O)CC(=O)CN1C(=O)c2ccccc2Nc2ncccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.