Using Cn1ccnc1S, ClCc1nc(-c2ccc3c(c2)OCO3)c2cc3c(cc2n1)OCO3 to produce Cn1ccnc1SCc1nc(-c2ccc3c(c2)OCO3)c2cc3c(cc2n1)OCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.