InChI=1S/C21H42O3/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-24-20-21(23)19-22/h17-18,21-23H,2-16,19-20H2,1H3/b18-17-/t21-/m0/s1