InChI=1S/C15H22O3/c1-11(6-8-16)5-7-15-13(2,3)9-12(17)10-14(15,4)18-15/h5-8,12,17H,9-10H2,1-4H3/b7-5+,11-6-/t12-,14+,15-/m0/s1