2H-3,1-BENZOXAZINE-2,4(1H)-DIONE, 6-NITRO- 4-27-00-03332 (Beilstein Handbook Reference) 4693-02-1 5-Nitroisatoic anhydride 6-Nitro-2H-3,1-benzoxazine-2,4(1H)-dione 6-Nitro-isatoic anhydride BRN 0219188 EINECS 225-151-1 NSC 73615