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