InChI=1S/C27H28O13/c1-9-20(32)23(35)26(40-27-24(36)22(34)19(31)10(2)38-27)25(37-9)18-14(30)8-16-17(21(18)33)13(29)7-15(39-16)11-3-5-12(28)6-4-11/h3-10,19,22-28,30-31,33-36H,1-2H3