Using C1COCCN1, C[C@@H](C(=O)O)N1CC[C@H](NS(=O)(=O)c2ccc3cc(Cl)ccc3c2)C1=O to produce C[C@@H](C(=O)N1CCOCC1)N1CC[C@H](NS(=O)(=O)c2ccc3cc(Cl)ccc3c2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.