InChI=1S/C21H26O11/c1-21(28,9-30-20-17(25)15(23)16(24)18(32-20)19(26)27)6-5-11-7-10-3-4-14(22)31-13(10)8-12(11)29-2/h3-4,7-8,15-18,20,23-25,28H,5-6,9H2,1-2H3,(H,26,27)