(Z)-2,2'-[(1,4-dioxobut-2-ene-1,4-diyl)bis(oxy)]bis[2-octyl-1,3,2-dioxastannepin-4,7-dione]

2,2'-[[(2Z)-1,4-Dioxo-2-butene-1,4-diyl]bis(oxy)]bis[2-octyl-1,3,2-dioxastannepin-4,7-dione]