InChI=1S/C20H24O8/c1-10(2)3-6-12-13(7-4-11-5-8-15(22)28-19(11)12)26-20-18(25)17(24)16(23)14(9-21)27-20/h3-5,7-8,14,16-18,20-21,23-25H,6,9H2,1-2H3