Using O=C1C=CC2=C(C1)n1ccc3c1=C(CCC=3)c1nncn12, ClCC1CC1 to produce O=C1C=CC2=C(C1CC1CC1)n1ccc3c1=C(CCC=3)c1nncn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.