Using COC(=O)CCNC(=O)c1ccc2c(c1)nc(-c1ccc3c(c1)CCC3=NO)n2C to produce COC(=O)CCNC(=O)c1ccc2c(c1)nc(-c1ccc3c(c1)CCC3N)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.