InChI=1S/C12H13NO8S/c1-2-11(15)13-8(12(16)17)5-7-3-4-9(14)10(6-7)21-22(18,19)20/h2-4,6,8,14H,1,5H2,(H,13,15)(H,16,17)(H,18,19,20)