InChI=1S/C21H20O14S/c22-6-14-19(35-36(30,31)32)17(28)18(29)21(34-14)16-11(26)4-10(25)15-12(27)5-13(33-20(15)16)7-1-2-8(23)9(24)3-7/h1-5,14,17-19,21-26,28-29H,6H2,(H,30,31,32)