InChI=1S/C10H12N4O5S/c1-14-7-4-8(15)6(12-13-10(11)16)2-5(7)3-9(14)20(17,18)19/h2,4,9H,3H2,1H3,(H3,11,13,16)(H,17,18,19)/b12-6-