Using CC(=O)C(C)(C)C, COC(=O)c1cc(OC)c(OC)c(OC)c1 to produce COc1cc(C(=O)CC(=O)C(C)(C)C)cc(OC)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.