Using O=C([O-])[O-], CCCOc1nc2c(Cl)cc(F)c(-n3c(=O)cc(C(F)(F)F)[nH]c3=O)c2s1 to produce CCCOc1nc2c(Cl)cc(F)c(-n3c(=O)cc(C(F)(F)F)n(C)c3=O)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.