InChI=1S/C15H14O9S/c16-8-4-13-9(14(5-8)24-25(20,21)22)6-12(19)15(23-13)7-1-2-10(17)11(18)3-7/h1-5,12,15-19H,6H2,(H,20,21,22)/t12-,15-/m1/s1