InChI=1/C20H20N4O4S/c1-27-15-8-7-12-11(18(15)28-2)9-14(22-12)19(26)21-10-17(25)24-20-23-13-5-3-4-6-16(13)29-20/h3-8,11,18H,9-10H2,1-2H3,(H,21,26)(H,23,24,25)/t11-,18+/m0/s1/f/h21,23H 6C2A2B68D82D5481