3,5,7,9,11,13,15-Heptaoxaheptadecan-2-ol,1,1,1,17,17,17-hexachloro-4,6,8,10,12,14-hexakis(trichloromethyl)-16-[(1,7,7-trimethylbicyclo[2.2.1]hept-2-yl)oxy]-, acetate