InChI=1S/C17H17NO7S/c1-24-17-11(19)6-8-7-12(20)18-15-13(8)14(17)9-4-2-3-5-10(9)16(15)25-26(21,22)23/h2-6,12,15-16,18-20H,7H2,1H3,(H,21,22,23)