InChI=1S/C13H20N2O7S/c14-6-5-11(22-23(19,20)21)8-15-13(18)12(17)7-9-1-3-10(16)4-2-9/h1-4,11-12,16-17H,5-8,14H2,(H,15,18)(H,19,20,21)