InChI=1S/C19H26O2/c1-5-6-11-9-13(20)15-14(10-11)21-19(4)8-7-12-16(19)17(15)18(12,2)3/h9-10,12,16-17,20H,5-8H2,1-4H3/t12-,16+,17+,19+/m0/s1