fumaroyl dichloride, Fumaric acid dichloride, fumaric acid dichloroanhydride, n-Butyl fumarate, fumaroyl chloride, Fumarsaeure-mono-n-butylester, 2-Butenedioyl dichloride, (E)-, fumaric acid chloroanhydride, but-2-enedioyl dichloride, Fumaric acid,butyl ester, mono-n-butyl maleate, Fumaric acid monobutyl ester, Monobutyl fumarate