InChI=1S/C14H15N3O4S/c1-9-7-12(11-8-13(11)21-22(18,19)20)17-14(15-9)16-10-5-3-2-4-6-10/h2-7,11,13H,8H2,1H3,(H,15,16,17)(H,18,19,20)