Using COC(=O)Cn1nc(-c2ccc(Cl)s2)n(Cc2ccccc2F)c1=O to produce O=C(O)Cn1nc(-c2ccc(Cl)s2)n(Cc2ccccc2F)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.