Using NCc1csc2c1S(=O)(=O)N=C(c1c(O)c3ccccc3n(Cc3ccccc3)c1=O)N2, O=C(O)CO to produce O=C(CO)NCc1csc2c1S(=O)(=O)N=C(c1c(O)c3ccccc3n(Cc3ccccc3)c1=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.