InChI=1S/C21H30O10/c1-3-4-11-5-7-12(8-6-11)30-21-19(27)17(25)15(23)13(31-21)9-28-20-18(26)16(24)14(22)10(2)29-20/h3,5-8,10,13-27H,1,4,9H2,2H3