InChI=1S/C20H28O2/c1-3-22-14-5-7-15-13(12-14)4-6-17-16(15)10-11-20(2)18(17)8-9-19(20)21/h4,12,15-18H,3,5-11H2,1-2H3/t15-,16+,17+,18-,20-/m0/s1