InChI=1S/C15H22O3/c1-9-11(17)4-10-5-15(18)7-13(2,8-16)6-12(15)14(9,10)3/h4,9,12,16,18H,5-8H2,1-3H3/t9-,12-,13-,14+,15+/m0/s1