Using O=C1CC(C(=O)O)c2ccccc21, NC(Cc1ccc(C(F)(F)F)cc1)C(O)c1ccc(F)cc1 to produce O=C1CC(C(=O)NC(Cc2ccc(C(F)(F)F)cc2)C(O)c2ccc(F)cc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.