InChI=1S/C16H14O10S/c1-6-10(17)13(20)11(18)9-12(19)14(21)16(25-15(6)9)7-2-4-8(5-3-7)26-27(22,23)24/h2-5,14,16-18,20-21H,1H3,(H,22,23,24)