3,6,9,14,16,21,24,27-Octaoxa-13,15,17-trisilanonacosane-1,29-diol,15-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)-13,13,15,17,17-pentamethyl-