InChI=1S/C15H22O3/c1-8-5-11(16)14(4)12(17)9-6-13(2,3)7-10(9)15(8,14)18/h5,9-10,12,17-18H,6-7H2,1-4H3/t9-,10+,12-,14+,15+/m0/s1