The molecule is an alpha-amino-acid anion that is the conjugate base of N(3)-fumaroyl-(S)-2,3-diaminopropanoic acid; major species at pH 7.3. It is a conjugate base of a N(3)-fumaroyl-(S)-2,3-diaminopropanoic acid.
(E)-4-[[(2S)-2-azaniumyl-2-carboxylatoethyl]amino]-4-oxobut-2-enoate