InChI=1S/C20H17N3O4S/c1-23-17(21-15-5-3-2-4-14(15)19(23)25)11-27-13-8-6-12(7-9-13)10-16-18(24)22-20(26)28-16/h2-9,16H,10-11H2,1H3,(H,22,24,26)