InChI=1S/C19H18N2O8S/c20-6-5-10-8-21-11-2-4-13-16(15(10)11)17(19(23)24)18(28-13)9-1-3-12(22)14(7-9)29-30(25,26)27/h1-4,7-8,17-18,21-22H,5-6,20H2,(H,23,24)(H,25,26,27)