InChI=1S/C17H20O11/c18-9(19)6-8(10(20)7-4-2-1-3-5-7)16(26)28-17-13(23)11(21)12(22)14(27-17)15(24)25/h1-5,8,10-14,17,20-23H,6H2,(H,18,19)(H,24,25)