InChI=1S/C16H24O4/c1-10-5-6-12-15(2,11(10)9-13(17)18)7-4-8-16(12,3)14(19)20/h11-12H,1,4-9H2,2-3H3,(H,17,18)(H,19,20)/t11-,12+,15+,16-/m0/s1