Using CCCCc1nn2cccc(C(=O)OC)c2c1Cc1ccc(-c2ccccc2-c2nnn[nH]2)cc1 to produce CCCCc1nn2cccc(C(=O)O)c2c1Cc1ccc(-c2ccccc2-c2nnn[nH]2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.