Using CCCC(=O)c1c(C)cc(C)cc1C, CCOC(=O)C(=O)OCC to produce CCOC(=O)C(=O)C(CC)C(=O)c1c(C)cc(C)cc1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.