InChI=1S/C25H34O4/c1-18(8-5-9-19(2)11-7-13-22-14-15-28-17-22)10-6-12-20(3)16-23-24(26)21(4)25(27)29-23/h8,11,14-17,20,27H,5-7,9-10,12-13H2,1-4H3/b18-8+,19-11+,23-16-/t20-/m0/s1