InChI=1S/C14H20N2O7S/c1-22-13-8-10(2-4-12(13)17)3-5-14(18)16-9-11(6-7-15)23-24(19,20)21/h2-5,8,11,17H,6-7,9,15H2,1H3,(H,16,18)(H,19,20,21)