Using O=C(O)c1ccc2ncsc2c1, NCc1cccc(Oc2ccccc2)c1 to produce O=C(NCc1cccc(Oc2ccccc2)c1)c1ccc2ncsc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.