InChI=1S/C20H26O7/c1-10-14(22)20-8-19(10,27)7-4-11(20)18(9-21)6-3-5-17(2,16(25)26)13(18)12(20)15(23)24/h9,11-14,22,27H,1,3-8H2,2H3,(H,23,24)(H,25,26)