Using COc1cccc(-c2cccc(Oc3nc(OC)cc(OC)n3)c2C(=O)OCc2ccccc2)n1 to produce COc1cccc(-c2cccc(Oc3nc(OC)cc(OC)n3)c2C(=O)O)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.