InChI=1S/C11H20N2O4S/c1-11(2,7-14)9(16)10(17)13-4-3-8(15)12-5-6-18/h5-6,9,14,16,18H,3-4,7H2,1-2H3,(H,12,15)(H,13,17)/b6-5-/t9-/m0/s1