(E)-5-((3aS,4R,5R,6aS)-5-hydroxy-4-((3S,E)-3-hydroxy-4-methyloct-1-en-6-yn-1-yl)hexahydropentalen-2(1H)-ylidene)pentanoicacid; (5E)-5-[(3aS,4R,5R,6aS)-Hexahydro-5-hydroxy-4-[(1E,3S)-3-hydroxy-4-methyl-1-octen-6-yn-1-yl]-2(1H)-pentalenylidene]pentanoic Acid; (1S,2R,3R,5S)-7-[(E)-4-Carboxybutylidene]-2-[(3S,1E)-3-hydroxy-4-methyl-6-octyn-1-enyl]-bicyclo[3.3.0]octane; Ciloprost; Endoprost; Ilomedin; ZK 36374