Using COC(=O)c1ccc(CCCN2[C@@H](CO)CCS2(=O)=O)s1 to produce COC(=O)c1ccc(CCCN2[C@@H](C=O)CCS2(=O)=O)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.