Using CCO[C@@H](Cc1ccc(-c2cnc(NC)s2)cc1)C(=O)O, CO to produce CCO[C@@H](Cc1ccc(-c2cnc(NC)s2)cc1)C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.