InChI=1S/C15H14O10S/c16-8-1-6-4-12(25-26(21,22)23)15(24-14(6)11(19)5-8)7-2-9(17)13(20)10(18)3-7/h1-3,5,12,15-20H,4H2,(H,21,22,23)/p-1/t12-,15-/m1/s1