Using O=C(O)c1ccc2c(c1)C(=O)c1c(O)ccc(O)c1C2=O to produce O=C(O)c1ccc2c(c1)C(=O)C1=C(O)CCC(O)=C1C2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.