Using O=C([O-])CC[C@H](NC(=O)C=Cc1ccco1)C(=O)[O-] to produce O=C(O)CC[C@H](NC(=O)C=Cc1ccco1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.