Using O=Cc1ccccc1S(=O)(=O)[O-], CCOC(=O)C1=C[C@@H](OC(CC)CC)[C@@H](O)[C@H](N)C1 to produce CCOC(=O)C1=C[C@@H](OC(CC)CC)[C@@H](O)[C@H](N=Cc2ccccc2S(=O)(=O)[O-])C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.