InChI=1S/C19H17NO8S/c1-20-12-5-3-2-4-10(12)18(22)16-13(21)7-14-11(17(16)20)6-15(28-14)19(8-26-19)9-27-29(23,24)25/h2-5,7,15,21H,6,8-9H2,1H3,(H,23,24,25)