Using CCO, CC(=O)S[C@@H]1C[C@@H](C(=O)N(CCc2ccccc2)CC(=O)O)N(S(=O)(=O)c2ccc3ccccc3c2)C1 to produce CCOC(=O)CN(CCc1ccccc1)C(=O)[C@@H]1C[C@@H](SC(C)=O)CN1S(=O)(=O)c1ccc2ccccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.