Using CCN1c2ncc(C=Cc3ccccc3)cc2C(=O)Nc2c1nc(Cl)c(Br)c2C to produce CCN1c2ncc(CCc3ccccc3)cc2C(=O)Nc2c(C)ccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.