Using O=S(=O)(c1ccccc1)n1cc(-c2cn[nH]c2)c2cc(-c3ccc4c(c3)CCO4)cnc21 to produce c1cc2c(cc1-c1cnc3[nH]cc(-c4cn[nH]c4)c3c1)CCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.