Using CN1CCOc2cc(O)c(C3(O)C(=O)N(Cc4ccc(C(F)(F)F)o4)c4ccccc43)cc21 to produce CN1CCOc2cc(O)c(C3C(=O)N(Cc4ccc(C(F)(F)F)o4)c4ccccc43)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.