InChI=1S/C19H17NO8S/c1-19(8-26-19)18-17(28-29(23,24)25)14-12(27-18)7-11(21)13-15(14)20(2)10-6-4-3-5-9(10)16(13)22/h3-7,17-18,21H,8H2,1-2H3,(H,23,24,25)