InChI=1S/C17H22O11/c18-8-5-7(3-1-2-4-10(19)20)6-9(11(8)21)27-17-14(24)12(22)13(23)15(28-17)16(25)26/h5-6,12-15,17-18,21-24H,1-4H2,(H,19,20)(H,25,26)