Using CCCc1cn(CC(=O)N2CCOC(C(=O)OCc3ccccc3)C2)nn1 to produce CCCc1cn(CC(=O)N2CCOC(C(=O)O)C2)nn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.