InChI=1S/C28H28O8/c1-2-21(16-7-4-3-5-8-16)22(18-9-6-10-19(29)15-18)17-11-13-20(14-12-17)35-28-25(32)23(30)24(31)26(36-28)27(33)34/h3-15,23-26,28-32H,2H2,1H3,(H,33,34)/b22-21+