InChI=1S/C28H28O7/c1-5-9-19-14-24(30-3)27(25(15-19)31-4)34-18(2)26(35-28(29)20-10-7-6-8-11-20)21-12-13-22-23(16-21)33-17-32-22/h5-8,10-16,18,26H,1,9,17H2,2-4H3