InChI=1S/C14H20N2O7S/c1-22-12-9-10(4-5-13(18)16-7-3-2-6-15)8-11(17)14(12)23-24(19,20)21/h4-5,8-9,17H,2-3,6-7,15H2,1H3,(H,16,18)(H,19,20,21)