InChI=1S/C28H40O4/c1-20(2)10-7-11-21(3)12-8-13-22(4)14-9-15-23(5)16-17-25-18-26(30)19-27(31)28(25)32-24(6)29/h10,12,14,16,18-19,30-31H,7-9,11,13,15,17H2,1-6H3/b21-12+,22-14+,23-16+