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