InChI=1S/C15H20O2/c1-8(2)5-13-15(17-13)10(4)7-11-12(16)6-9(3)14(11)15/h5,10-11,13-14H,3,6-7H2,1-2,4H3/t10-,11+,13+,14+,15-/m0/s1