InChI=1S/C15H22O3/c1-9(2)7-11(16)13(17)14(4)8-15(18)6-5-10(3)12(14)15/h7,11-12,16,18H,3,5-6,8H2,1-2,4H3/t11-,12+,14+,15+/m1/s1