5227-68-9 6H-Purin-6-one, 2-amino-1,9-dihydro-, 7-oxide (9CI) 7-Hydroxyguanine Antibiotic 3780 Antibiotic PD 113876 BRN 0648061 Guanine 7-N-oxide Guanine 7-oxide Guanine, N-7-oxide Guanine-7-N-oxide NSC 353056 PD 113876