1,3-dihydroxy-8-nitroacridin-9(10H)-one 9(10H)-acridinone, 1,3-dihydroxy-8-nitro- InChI=1/C13H8N2O5/c16-6-4-8-12(10(17)5-6)13(18)11-7(14-8)2-1-3-9(11)15(19)20/h1-5,16-17H,(H,14,18