InChI=1S/C20H28O3/c1-12(2)18-13-5-8-16-19(3,14(13)6-7-15(18)22)10-9-17(23)20(16,4)11-21/h6-7,12,16,21-22H,5,8-11H2,1-4H3/t16-,19-,20-/m1/s1