Using CCCCCCCCc1ccc2nc(-c3ccc(C(=O)OC)cc3)sc2c1 to produce CCCCCCCCc1ccc2nc(-c3ccc(C(=O)O)cc3)sc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.