Using COC1=C(OC)C(=O)C(Cc2ccc(OC(C)=O)c(C(=O)O)c2)=C(C)C1=O to produce COC1=C(OC)C(=O)C(Cc2ccc(O)c(C(=O)O)c2)=C(C)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.