Using COc1ccc(C(=O)Nc2ccc3c(c2)CN(C(=O)C(F)(F)F)C(C)(C)C3)cc1C(F)(F)F to produce COc1ccc(C(=O)Nc2ccc3c(c2)CNC(C)(C)C3)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.