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