The molecule is an acyl-CoA oxoanion obtained via deprotonation of the phosphate and diphosphate OH groups of (E)-4-(trimethylammonio)but-2-enoyl-CoA; major species at pH 7.3. It is a conjugate base of an (E)-4-(trimethylammonio)but-2-enoyl-CoA.
[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-4-hydroxy-2-[[[[(3R)-3-hydroxy-2,2-dimethyl-4-oxo-4-[[3-oxo-3-[2-[(E)-4-(trimethylazaniumyl)but-2-enoyl]sulfanylethylamino]propyl]amino]butoxy]-oxidophosphoryl]oxy-oxidophosphoryl]oxymethyl]oxolan-3-yl] phosphate