InChI=1S/C18H12O10S/c1-7-2-10-15-13(26-7)5-9(19)6-14(15)27-17(16(10)22)8-3-11(20)18(12(21)4-8)28-29(23,24)25/h2-6,20-22H,1H3,(H,23,24,25)