InChI=1S/C12H14N4O5S/c1-5(18)20-7-2-6(4-17)21-10(7)16-9-8(22-12(16)19)3-14-11(13)15-9/h3,6-7,10,17H,2,4H2,1H3,(H2,13,14,15)/t6-,7+,10+/m0/s1