Using CCOC(=O)c1c(C2CCCCC2)csc1NC(=O)Nc1ccc(F)c(F)c1 to produce O=C(Nc1ccc(F)c(F)c1)Nc1scc(C2CCCCC2)c1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.