Synonyms: (E)-(3aS, 4R, 5R, 6aS)-Hexahydro-5-hydroxy-4-[(E)-(3S,4RS)-3-hydroxy-4-methyl-1-octen-6-ynyl]-Delta2(1H),Delta-pentalenevaleric acid; Cilaprost; ZK 36374; (5E)-5-[(3aS,4R,5R,6aS)-Hexahydro-5-hydroxy-4-[(1E,3S)-3-hydroxy-4-methyl-1-octen-6-ynyl]-2(1H)-pentalenylidene]pentanoic acid...