InChI=1S/C15H20N2O7S/c1-15(2)6-11(19)13-12(24-15)4-3-9(14(13)17)10(18)5-8(16)7-23-25(20,21)22/h3-4,8H,5-7,16-17H2,1-2H3,(H,20,21,22)