InChI=1S/C15H14O10S/c1-21-8-4-2-7-3-5-9(16)23-11(7)10(8)12-13-15(25-13,14(17)24-12)6-22-26(18,19)20/h2-5,12-14,17H,6H2,1H3,(H,18,19,20)