Using CCOC(=O)CCC(=O)OCC, COc1cc(C=O)cc(OC)c1O to produce CCOC(=O)C(=Cc1cc(OC)c(O)c(OC)c1)CC(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.