Using O=C(N[C@H]1CN(C(=O)NS(=O)(=O)N2CCCN(NC(=O)c3cc(=O)c(O)c[nH]3)C2=O)C1=O)OCc1ccccc1 to produce N[C@H]1CN(C(=O)NS(=O)(=O)N2CCCN(NC(=O)c3cc(=O)c(O)c[nH]3)C2=O)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.