InChI=1/C19H13NO6/c21-15-8-2-10(9-14(15)19(25)26)1-5-12-6-3-11-4-7-13(18(23)24)17(22)16(11)20-12/h1-9,21-22H,(H,23,24)(H,25,26)/p-2/b5-1+/fC19H11NO6/q-2 143C888B762FC613