InChI=1S/C28H28O13/c1-13(29)36-12-23-26(38-14(2)30)25(34)27(39-15(3)31)28(41-23)40-22-10-20-18(9-21(22)35-4)24(33)19(11-37-20)16-5-7-17(32)8-6-16/h5-11,23,25-28,32,34H,12H2,1-4H3