InChI=1S/C30H34O4/c1-3-5-7-9-15-29(31)33-27-21-17-25(18-22-27)13-11-12-14-26-19-23-28(24-20-26)34-30(32)16-10-8-6-4-2/h17-24H,3-10,15-16H2,1-2H3