InChI=1S/C20H28O2/c1-13(12-21)6-5-10-19(3)16-8-7-14(2)15-9-11-20(4,22)17(15)18(16)19/h5-6,10,12,15-18,22H,2,7-9,11H2,1,3-4H3/b10-5+,13-6-/t15-,16-,17+,18+,19-,20-/m0/s1