Using CCCN1Cc2ccccc2C(=O)c2cc(CC(=O)OC)ccc21 to produce CCCN1Cc2ccccc2C(=O)c2cc(CC(=O)O)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.