InChI=1/C15H12N2O7S/c1-23-13(21)10-9(11(14(22)24-2)17-15(25)16-10)12(20)7-4-3-6(18)5-8(7)19/h3-5,18-19H,1-2H3,(H,16,17,25)/p-1/fC15H11N2O7S/q-1 4BFDB77692F5CADA