Using CCOC(=O)c1ccc2c(c1)C(NCc1cccnc1)c1ccccc1CO2 to produce O=C(O)c1ccc2c(c1)C(NCc1cccnc1)c1ccccc1CO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.