Using CCCCCC=C(COc1cc(C(=O)OC)ccc1I)c1ccc2c(c1)C(C)(C)CCC2(C)C to produce CCCC=CCC1(c2ccc3c(c2)C(C)(C)CCC3(C)C)COc2cc(C(=O)OC)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.