Using COC(=O)[C@@H](C)NS(=O)(=O)c1ccc2c(Cl)cnc(NC(=N)N)c2c1 to produce C[C@@H](NS(=O)(=O)c1ccc2c(Cl)cnc(NC(=N)N)c2c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.