InChI=1S/C19H26O2/c1-5-19(4)10-8-13-12-7-6-9-18(2,3)14(12)11-15(20)16(13)17(19)21/h5,11,17,20-21H,1,6-10H2,2-4H3/t17-,19-/m0/s1