InChI=1S/C23H26O7/c1-6-7-16-10-20(25-4)23(21(11-16)26-5)29-14(2)22(30-15(3)24)17-8-9-18-19(12-17)28-13-27-18/h6,8-12,14,22H,1,7,13H2,2-5H3