2-Butenedioic acid (Z)-, monobutyl ester, trianhydride with antimonic acid (H3SbO3) 5,7,12-Trioxa-6-stibahexadeca-2,9-dienoic acid, 6-(((2Z)-4-butoxy-1,4-dioxo-2-butenyl)oxy)-4,8,11-trioxo-, butyl ester, (2Z,9Z)- 71850-72-1