InChI=1S/C17H19NO9S2/c18-4-5-28-17-12-11(7-10(19)13(20)14(12)21)26-16(15(17)22)8-2-1-3-9(6-8)27-29(23,24)25/h1-3,6-7,15-17,19-22H,4-5,18H2,(H,23,24,25)