InChI=1S/C23H28O8/c1-13(24)30-17-11-16(6-4-14-5-7-18(25)21(8-14)28-2)31-20(12-17)15-9-19(26)23(27)22(10-15)29-3/h5,7-10,16-17,20,25-27H,4,6,11-12H2,1-3H3