Using COc1ccc(C=CC(=O)C2C(=O)C=C(C)OC2=O)cc1O to produce COc1ccc(CCC(=O)C2C(=O)C=C(C)OC2=O)cc1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.