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