The simple structure of methyl acetoacetate is CH3COCH2COOCH3. Though this chemical has no carbon-carbon double bonds, it can also make the bromine water fade (occurrence of extraction, which is a physical change). http://www.guidechem.com/cas-105/105-45-3.html here is more information about Methyl acetoacetate, it may help you.
It is possible for methyl acetoacetate to make bromine water fade. This is because the acid in the acetoacetate will chemically react with the bromine hence cause the change of color. Get detailed information about this reaction on http://www.wiki86.com/view/443207.htm.