InChI=1S/C21H28O10/c1-5-6-11-7-8-12(13(9-11)28-4)29-14(22)10-21(2,3)31-20-17(25)15(23)16(24)18(30-20)19(26)27/h5,7-9,15-18,20,23-25H,1,6,10H2,2-4H3,(H,26,27)