butyl (Z,Z,Z)-6-[(4-butoxy-1,4-dioxobut-2-enyl)oxy]oct-6-yl-4,8,11-trioxo-5,7,12-trioxa-6-stannahexadeca-2,9-dienoate

(2Z,9Z)-6-[[(2Z)-4-Butoxy-1,4-dioxo-2-butenyl]oxy]-6-octyl-4,8,11-trioxo-5,7,12-trioxa-6-stannahexadeca-2,9-dienoic acid butyl ester