Using O=C(Nc1cnc(-c2ccncc2)c(Cl)n1)C1CC1, [Zn+]c1ncco1 to produce O=C(Nc1cnc(-c2ccncc2)c(-c2ncco2)n1)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.