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