InChI=1S/C13H16N2O7S/c1-9(16)15(21-22-23(17,18)19)6-5-10-8-14-13-4-3-11(20-2)7-12(10)13/h3-4,7-8,14H,5-6H2,1-2H3,(H,17,18,19)