Using CCOC(=O)CCN=C=O, Cc1nc(N)sc1-c1cccc(S(C)(=O)=O)c1 to produce CCOC(=O)CCNC(=O)Nc1nc(C)c(-c2cccc(S(C)(=O)=O)c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.