InChI=1S/C27H30O11/c1-14(2)4-3-5-15(13-36-27-23(31)21(29)22(30)25(38-27)26(32)33)8-10-35-24-16-6-7-20(28)37-19(16)12-18-17(24)9-11-34-18/h4,6-9,11-12,21-23,25,27,29-31H,3,5,10,13H2,1-2H3,(H,32,33)/b15-8-