InChI=1/C18H14N4O4S/c23-17(20-12-2-6-15-11(7-12)9-19-21-15)10-1-5-14-16(8-10)27(25,26)22(18(14)24)13-3-4-13/h1-2,5-9,13H,3-4H2,(H,19,21)(H,20,23)/f/h20-21H 933DE83365896816