InChI=1S/C17H12O10S/c18-11-3-1-2-9-14(11)17(22)15-10(16(9)21)4-8(5-12(15)19)6-26-13(20)7-27-28(23,24)25/h1-5,18-19H,6-7H2,(H,23,24,25)