Using O=C1c2ccccc2C(=O)N1O, Nc1nc2ccccc2c2sc(CCl)nc12 to produce Nc1nc2ccccc2c2sc(CON3C(=O)c4ccccc4C3=O)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.