Using CCOC(=O)c1cnc2c(NC(=O)c3c(Cl)cccc3Cl)cccc2c1Cl, [S-2] to produce CCOC(=O)c1cnc2c(NC(=O)c3c(Cl)cccc3Cl)cccc2c1S, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.