InChI=1S/C28H26O12/c1-39-20-11-14(4-7-17(20)31)23-22(13-3-6-16(30)19(33)10-13)24(27(36)37)25(23)28(38)40-21(26(34)35)9-12-2-5-15(29)18(32)8-12/h2-8,10-11,21-25,29-33H,9H2,1H3,(H,34,35)(H,36,37)