Using COc1ccc(Br)c(C(C)(C)c2cc3ccccc3s2)c1, O=C=O to produce COc1ccc(C(=O)O)c(C(C)(C)c2cc3ccccc3s2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.