InChI=1S/C15H24O3/c1-6-15(5)10-8-13(18-15)11(2)12(16)7-9-14(3,4)17/h6-7,9,11,13,17H,1,8,10H2,2-5H3/b9-7+/t11?,13-,15-/m1/s1