InChI=1S/C14H20N2O6S/c1-21-13-10-11(4-6-12(13)22-23(18,19)20)5-7-14(17)16-9-3-2-8-15/h4-7,10H,2-3,8-9,15H2,1H3,(H,16,17)(H,18,19,20)