The molecule is a linear tetrapyrrole obtained by the enzymic degradation of heme by Mycobacterium tuberculosis enzyme MhuD. It is an arenecarbaldehyde, an aromatic ketone, a dicarboxylic acid and a linear tetrapyrrole. It is a conjugate acid of a mycobilin b(2-).
3-[(2Z,5Z)-2-[[3-(2-carboxyethyl)-5-(4-ethenyl-5-formyl-3-methyl-1H-pyrrole-2-carbonyl)-4-methyl-1H-pyrrol-2-yl]methylidene]-5-[(3-ethenyl-4-methyl-5-oxopyrrol-2-yl)methylidene]-4-methylpyrrol-3-yl]propanoic acid