The molecule is a prostanoid that is prostaglandin F1alpha lacking two methylenes in the carboxyalkyl chain and having inverted stereochemistry at the 8-position. It derives from a prostaglandin F1alpha.
5-[(1S,2R,3R,5S)-3,5-dihydroxy-2-[(E,3S)-3-hydroxyoct-1-enyl]cyclopentyl]pentanoic acid