Using CC1(C)CCC(C)(C)C2=C1CC(C(=O)O)C2, CCCCCI to produce CCCCCC1(C(=O)O)CC2=C(C1)C(C)(C)CCC2(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.