InChI=1/C16H12N2O4S/c19-9-5-6-10(12(20)7-9)16(22)18-17-8-14-15(21)11-3-1-2-4-13(11)23-14/h1-8,19-21H,(H,18,22)/p-1/b17-8+/fC16H11N2O4S/h21h,18H/q-1 90A5F16A1ED6018F