InChI=1S/C13H18N2O7S/c14-6-5-9(16)7-15-13(17)12-11(21-12)8-1-3-10(4-2-8)22-23(18,19)20/h1-4,9,11-12,16H,5-7,14H2,(H,15,17)(H,18,19,20)