The molecule is a tetracarboxylic acid. It has a role as a cofactor and a prosthetic group. It is a conjugate acid of a dipyrromethane cofactor(4-). It derives from a hydride of a dipyrromethane.
3-[5-[[3-(2-carboxyethyl)-4-(carboxymethyl)-5-methyl-1H-pyrrol-2-yl]methyl]-4-(carboxymethyl)-1H-pyrrol-3-yl]propanoic acid