InChI=1S/C33H30O8/c1-37-25-16-22(35)32(39-3)33-29(25)20(14-23(41-33)18-10-6-4-7-11-18)28-26(38-2)17-27-30(31(28)36)21(34)15-24(40-27)19-12-8-5-9-13-19/h4-13,16-17,20,23-24,35-36H,14-15H2,1-3H3/t20-,23-,24+/m0/s1