InChI=1S/C13H8O11S/c14-5-2-4-8(11(9(5)16)24-25(20,21)22)7-3(12(17)18)1-6(15)10(7)23-13(4)19/h2-3,14,16H,1H2,(H,17,18)(H,20,21,22)