InChI=1/C16H11NO4/c18-13-5-1-10(2-6-13)11-3-7-14-12(9-11)4-8-15(19)16(14)17(20)21/h1-9,18-19H/p-1/fC16H10NO4/h19h/q-1 967E8590EB8A3D1A