Using COc1ccc(/C=C/c2cc(C(=O)O)ccc2C(=O)O)cc1 to produce COc1ccc(CCc2cc(C(=O)O)ccc2C(=O)O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.