InChI=1S/C19H26O8/c1-9-5-13-18(7-24-10(2)20,15(23)14(9)22)17(4)6-12(26-11(3)21)16(27-13)19(17)8-25-19/h5,12-16,22-23H,6-8H2,1-4H3