The molecule is a linear tetrapyrrole anion obtained by deprotonation of the two carboxy groups of biliverdin beta; major species at pH 7.3. It is a dicarboxylic acid dianion and a linear tetrapyrrole anion. It is a conjugate base of a biliverdin beta.
3-[(2Z)-2-[[3-(2-carboxylatoethyl)-5-[(Z)-[(5Z)-4-ethenyl-5-[(4-ethenyl-3-methyl-5-oxopyrrol-2-yl)methylidene]-3-methylpyrrol-2-ylidene]methyl]-4-methyl-1H-pyrrol-2-yl]methylidene]-4-methyl-5-oxopyrrol-3-yl]propanoate