InChI=1S/C28H26O18/c29-13-5-1-11(9-15(13)31)3-7-17(32)44-23(26(39)40)24(27(41)42)45-18(33)8-4-12-2-6-14(30)16(10-12)43-28-21(36)19(34)20(35)22(46-28)25(37)38/h1-10,19-24,28-31,34-36H,(H,37,38)(H,39,40)(H,41,42)/b7-3+,8-4+