InChI=1S/C20H26O6/c1-10-11-4-5-12-19(9-21)7-3-6-18(2,17(25)26)14(19)13(16(23)24)20(12,8-11)15(10)22/h9,11-15,22H,1,3-8H2,2H3,(H,23,24)(H,25,26)