Tetrasiloxane,3,5-bis[[dimethyl[2-(7-oxabicyclo[4.1.0]hept-3-yl)ethyl]silyl]oxy]-1,1,1,7,7-pentamethyl-7-[2-(7-oxabicyclo[4.1.0]hept-3-yl)ethyl]-3,5-diphenyl-