InChI=1S/C21H20O15S/c22-6-13-15(26)17(28)18(29)21(34-13)35-20-16(27)14-10(25)4-8(23)5-12(14)33-19(20)7-1-2-9(24)11(3-7)36-37(30,31)32/h1-5,13,15,17-18,21-26,28-29H,6H2,(H,30,31,32)