InChI=1/C13H13N3O4S/c1-16-8-11(7-14-16)21(18,19)20-10-3-4-12-9(6-10)2-5-13(17)15-12/h3-4,6-8H,2,5H2,1H3,(H,15,17)/f/h15H 4F2E25B83D84D7BB