InChI=1S/C19H17NO9S/c1-20-10-5-3-2-4-9(10)16(23)13-11(22)6-12-14(15(13)20)17(29-30(24,25)26)18(28-12)19(7-21)8-27-19/h2-6,17-18,21-22H,7-8H2,1H3,(H,24,25,26)