Using O=Cc1ccc2ncccc2n1, Cc1cccc(Cl)c1CNC1=NC(=O)CS1 to produce Cc1cccc(Cl)c1CNC1=NC(=O)C(=Cc2ccc3ncccc3n2)S1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.