Using O=CN[C@@H](CC(=O)O)C(=O)N[C@@H](Cc1ccccc1)C(=O)O, CO to produce COC(=O)[C@H](Cc1ccccc1)NC(=O)[C@@H](N)CC(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.