Using CI, S=C1c2nc[nH]c2N(Cc2ccc(Cl)cc2)C2=NCCN12 to produce CSC1=C2N=CN=C2N(Cc2ccc(Cl)cc2)C2=NCCN21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.