The molecule is a member of biladienes. It derives from a biladiene-ab. It is a conjugate acid of a red chlorophyll catabolite(2-).
3-[(2Z,3S,4S)-5-[(Z)-(4-ethenyl-3-methyl-5-oxopyrrol-2-ylidene)methyl]-2-[(5R)-2-[(3-ethyl-5-formyl-4-methyl-1H-pyrrol-2-yl)methyl]-5-methoxycarbonyl-3-methyl-4-oxo-1H-cyclopenta[b]pyrrol-6-ylidene]-4-methyl-3,4-dihydropyrrol-3-yl]propanoic acid