InChI=1S/C16H10O10S/c17-9-2-1-7(3-10(9)26-27(20,21)22)8-5-23-11-4-12-16(25-6-24-12)15(19)13(11)14(8)18/h1-5,17,19H,6H2,(H,20,21,22)