InChI=1S/C33H28O21S/c34-13-4-1-11(2-5-13)32(46)51-10-20-29(54-55(48,49)50)28(45)31(53-33(47)14-8-19(39)25(42)27(44)24(14)41)30(52-20)22-18(38)9-17(37)21(26(22)43)23(40)12-3-6-15(35)16(36)7-12/h1-9,20,28-31,34-39,41-45H,10H2,(H,48,49,50)