InChI=1/C8H7N3O4S/c9-16(14,15)4-1-2-6-5(3-4)7(12)11-8(13)10-6/h1-3H,(H2,9,14,15)(H2,10,11,12,13)/f/h10-11H,9H2 544DEBBFE89E51A4