Using C=Cc1cc(Cl)ccc1C1SCCNc2c1c(-c1ccccn1)nn2C to produce CCc1cc(Cl)ccc1C1SCCNc2c1c(-c1ccccn1)nn2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.