Using Cc1cnc(CNC2=NC(=O)CS2)cn1, O=Cc1ccc2ncccc2n1 to produce Cc1cnc(CNC2=NC(=O)C(=Cc3ccc4ncccc4n3)S2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.