Using CCOC(=O)C(Cc1ccc(O)cc1)OCC, OCCC1c2ccccc2Oc2ccccc21 to produce CCOC(=O)C(Cc1ccc(OCCC2c3ccccc3Oc3ccccc32)cc1)OCC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.