Using CCCCOC(=O)C1CCc2cc(C(C)(C)C)cc(C(C)(C)C)c2O1 to produce CC(C)(C)c1cc2c(c(C(C)(C)C)c1)OC(C(=O)O)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.