InChI=1S/C19H30O/c1-18-9-3-4-16(18)15-6-5-13-12-14(20)7-11-19(13,2)17(15)8-10-18/h5,14-17,20H,3-4,6-12H2,1-2H3/t14-,15-,16?,17?,18-,19-/m0/s1