7-[(tributylstannyl)oxy]-tetrasiloxane-1,1,1,3,3,5,5,7,7-nonol

9,9-Dibutyl-2,4,6,8-tetraoxa-1,3,5,7-tetrasila-9-stannatridecane-1,1,1,3,3,5,5,7,7-nonol