Using CCCN1CC=C(c2ccc(C)cc2C2CC(C)(C)CC(C)(C)C2)CC1 to produce CCCN1CCC(c2ccc(C)cc2C2CC(C)(C)CC(C)(C)C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.