InChI=1S/C10H14N2O8S/c1-5-3-12(10(15)11-9(5)14)8-2-6(7(4-13)19-8)20-21(16,17)18/h3,6-8,13H,2,4H2,1H3,(H,11,14,15)(H,16,17,18)