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