Using CCCCc1nc(Cl)c(CO)n1Cc1ccc2nc(-c3ccccc3C(=O)OC)ccc2c1 to produce CCCCc1nc(Cl)c(CO)n1Cc1ccc2nc(-c3ccccc3C(=O)O)ccc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.