Using CCn1c(C(C)N)nc2ccccc21, Clc1ncnc2[nH]cnc12 to produce CCn1c(C(C)Nc2ncnc3[nH]cnc23)nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.