Using COc1cc2c(c(Cl)c1Cl)C(=O)C(C)C2c1ccccc1, CI to produce COc1cc2c(c(Cl)c1Cl)C(=O)C(C)(C)C2c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.