Using CCOC(=O)c1cc(Oc2ccc3c(c2)CCN3C(=O)Nc2cccc(C(F)(F)F)c2)ncn1 to produce O=C(O)c1cc(Oc2ccc3c(c2)CCN3C(=O)Nc2cccc(C(F)(F)F)c2)ncn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.