Using OB(O)c1ccc(F)cc1F, CCOC(=O)c1cc2cnnc(Cl)c2n(C)c1=O to produce Cn1c(=O)c(C(=O)O)cc2cnnc(-c3ccc(F)cc3F)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.