InChI=1S/C16H12O10S/c1-25-11-5-7(17)4-9-13(11)14(19)12-8(15(9)26-27(22,23)24)2-6(16(20)21)3-10(12)18/h2-5,15,17-18H,1H3,(H,20,21)(H,22,23,24)