InChI=1S/C19H22N2O7S2/c1-26-15-2-4-16(5-3-15)29(22,23)20-8-10-21(11-9-20)30(24,25)17-6-7-18-19(14-17)28-13-12-27-18/h2-7,14H,8-13H2,1H3