Using C[O-], CCCc1cc(N)c(C)cc1C(F)(C(F)(F)F)C(F)(F)F to produce CCCc1cc(N)c(C)cc1C(OC)(C(F)(F)F)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.