Using O=C1NC(=O)c2ccccc21, CCOC(=O)CCC(O)C(F)(F)F to produce CCOC(=O)CCC(N1C(=O)c2ccccc2C1=O)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.