InChI=1S/C17H20O11/c18-9-10(19)13(16(25)26)28-17(11(9)20)27-12(15(23)24)8(14(21)22)6-7-4-2-1-3-5-7/h1-5,8-13,17-20H,6H2,(H,21,22)(H,23,24)(H,25,26)