Using Cc1c([N+](=O)[O-])ccnc1CSc1nc2cc3c(cc2[nH]1)OCO3, CO to produce COc1ccnc(CSc2nc3cc4c(cc3[nH]2)OCO4)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.