InChI=1S/C12H16N4O3S/c1-20-3-6-10(17)11(18)8(16-6)5-2-13-9-7(5)14-4-15-12(9)19/h2,4,6,8,10-11,13,16-18H,3H2,1H3,(H,14,15,19)/p+1/t6-,8+,10-,11+/m1/s1