Using O=C1OC(=O)c2c(F)cccc21, CCOC(=O)C1(N)CC1 to produce CCOC(=O)C1(N2C(=O)c3cccc(F)c3C2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.