Using CC(C)(C)[O-], Cc1cc2c(cc1C(=O)c1cccc(I)c1)C(C)(C)CCC2(C)C to produce C=C(c1cccc(I)c1)c1cc2c(cc1C)C(C)(C)CCC2(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.