Using Sc1nc2cc3c(cc2[nH]1)OCO3, CCOc1c(C)cnc(CCl)c1C to produce CCOc1c(C)cnc(CSc2nc3cc4c(cc3[nH]2)OCO4)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.