Using C=CCCCn1cnc2c(F)c(Nc3ccc(Br)cc3C)c(C(=O)OC)cc21 to produce C=CCCCn1cnc2c(F)c(Nc3ccc(Br)cc3C)c(C(=O)O)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.