1,7-diallyl-1,1,3,3,5,5,7,7-octamethyltetrasiloxane InChI=1/C14H34O3Si4/c1-11-13-18(3,4)15-20(7,8)17-21(9,10)16-19(5,6)14-12-2/h11-12H,1-2,13-14H2,3-10H TETRASILOXANE,1,7-BIS-(ALLYL),OCTAMETHYL tetrasiloxane, 1,1,3,3,5,5,7,7-octamethyl-1,7-di-2-propenyl-