InChI=1S/C18H24O3/c1-5-18(4)11-10-15(12(2)3)21-17(18)16(20)13-6-8-14(19)9-7-13/h5-9,15-17,19-20H,1-2,10-11H2,3-4H3/t15-,16-,17+,18+/m0/s1