Using COC(=O)c1ccc(C(=O)Cl)cc1, CCOC(=O)c1cnc2c(S)cccn2c1=O to produce CCOC(=O)c1cnc2c(SC(=O)c3ccc(C(=O)OC)cc3)cccn2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.