InChI=1S/C16H12O10S/c17-9-4-11(19)13-12(5-9)26-16(15(21)14(13)20)7-1-2-8(10(18)3-7)6-25-27(22,23)24/h1-5,17-19,21H,6H2,(H,22,23,24)