Using CI, Cc1cc(S(=O)(=O)CCO)cc2c(Nc3cccc4c3CCO4)c(C(N)=O)cnc12 to produce COCCS(=O)(=O)c1cc(C)c2ncc(C(N)=O)c(Nc3cccc4c3CCO4)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.