Using COc1ccc2[nH]c3cc(C(=O)OCc4ccccc4)c4c(c3c2c1)C(=O)NC4=O to produce COc1ccc2[nH]c3cc(C(=O)O)c4c(c3c2c1)C(=O)NC4=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.