InChI=1/C20H16N2O6S/c1-27-16-9-14(28-10-11-3-2-4-13(7-11)19(25)26)6-5-12(16)8-15-17(23)21-20(29)22-18(15)24/h2-9H,10H2,1H3,(H,25,26)(H2,21,22,23,24,29)/p-2/fC20H14N2O6S/h21H/q-2/b15-8- 39E46B138B5D4638