InChI=1S/C30H28O8/c1-19(18-38-29(35)16-8-21-7-14-27(34)28(17-21)37-2)3-11-23-26(33)15-12-24(30(23)36)25(32)13-6-20-4-9-22(31)10-5-20/h3-10,12-17,31,33-34,36H,11,18H2,1-2H3/b13-6+,16-8+,19-3-