InChI=1/C14H14N2O6S/c1-22-14(19)11-3-2-6-16(11)23(20,21)8-4-5-10-9(7-8)12(17)13(18)15-10/h4-5,7,11H,2-3,6H2,1H3,(H,15,17,18)/t11-/m1/s1/f/h15H 31B2C30CDC7593EC