Using CCOC(=O)c1c(C(=O)OC)ccn(Cc2ccccc2)c1=O to produce CCOC(=O)c1c(C(=O)O)ccn(Cc2ccccc2)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.