InChI=1S/C15H20N2O6S/c18-14-3-1-2-12-9-6-11(15(19)17(12)14)13-7-10(23-24(20,21)22)4-5-16(13)8-9/h1-3,9-11,13,15,19H,4-8H2,(H,20,21,22)