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