Using O=C1CCCc2sc(CN3CCN(S(=O)(=O)c4cc5ccc(Cl)cc5s4)CC3=O)nc21, NO to produce O=C1CN(S(=O)(=O)c2cc3ccc(Cl)cc3s2)CCN1Cc1nc2c(s1)CCCC2=NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.