InChI=1S/C16H16O11/c17-9(5-1-2-6-7(3-5)26-4-25-6)8(15(21)22)13-11(19)10(18)12(20)14(27-13)16(23)24/h1-3,8,10-14,18-20H,4H2,(H,21,22)(H,23,24)