InChI=1S/C20H34O4/c1-14-5-8-17-19(2,10-4-11-20(17,3)18(23)24)16(14)7-6-15(13-22)9-12-21/h15-17,21-22H,1,4-13H2,2-3H3,(H,23,24)/t15-,16-,17+,19+,20+/m1/s1