Using COC(=O)C(CCC(C(=O)OC)c1cc(OC)c(OC)c(OC)c1)c1cc(OC)c(OC)c(OC)c1 to produce COc1cc(C(CCC(C(=O)O)c2cc(OC)c(OC)c(OC)c2)C(=O)O)cc(OC)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.