InChI=1S/C20H24O8/c1-5-9(2)18(23)27-13-7-20(4,25)17-16(28-17)15(22)11(8-21)6-12-14(13)10(3)19(24)26-12/h5-6,12-14,16-17,21,25H,3,7-8H2,1-2,4H3