InChI=1S/C19H17N3O9S/c23-9-3-1-2-6-7-4-20-19-22(15(7)21-10(6)9)8(5-32-19)17(29)31-18-13(26)11(24)12(25)14(30-18)16(27)28/h1-4,8,11-14,18,23-26H,5H2,(H,27,28)