Using NCc1ccccc1, COc1ccc(N2CCOCC2)c2sc(C(=O)O)nc12 to produce COc1ccc(N2CCOCC2)c2sc(C(=O)NCc3ccccc3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.