Using CCOC(C)=O, COC(=O)c1ccc(OCCCOc2ccccc2)cc1C(=O)OC to produce O=C1CC(=O)c2cc(OCCCOc3ccccc3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.