Using CCOC(=O)Cl, Cc1c(-c2cccs2)n[nH]c1C(F)(F)F to produce Cc1c(-c2ccc(C(=O)O)s2)n[nH]c1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.