2-Butenedioic acid (Z)-, monobutyl ester, dianhydride with antimonic acid (H3SbO3), monobutyl ester 5,7,12-Trioxa-6-stibahexadeca-2,9-dienoic acid, 6-butoxy-4,8,11-trioxo-, butyl ester, (Z,Z)- 69545-71-7