InChI=1S/C17H14O10S/c1-25-12-5-10(18)6-13-14(12)15(20)16(21)17(27-13)8-2-3-9(11(19)4-8)7-26-28(22,23)24/h2-6,18-19,21H,7H2,1H3,(H,22,23,24)