InChI=1/C12H11NO5/c1-6(14)9(12(17)18)13-10(15)7-4-2-3-5-8(7)11(13)16/h2-6,9,14H,1H3,(H,17,18)/p-1/t6-,9+/m0/s1/fC12H10NO5/q-1 DBFC3E75C5A72003