InChI=1S/C22H26O7/c1-6-7-11-9-13(24)26-18-14(11)19-16(17(25)15(18)12(23)8-10(2)3)20-21(27-19)22(4,5)29-28-20/h9-10,20-21,25H,6-8H2,1-5H3