(+)-(2E,3aS,4R,5R,6aS)-4-((1E,3S)-3-Cyclopentyl-3-hydroxypropenyl)-3,3a,4,5,6,6a-hexahydro-5-hydroxy-delta(sup 2(1H),delta)-pentalenevaleric acid 83997-19-7 Ataprost Ataprost [INN] Ataprostum [INN-Latin] Ono 41483 Pentanoic acid, 5-(4-(3-cyclopentyl-3-hydroxy-1-propenyl)hexahydro-5-hydroxy-2(1H)-pentalenylidene)-, (3aS-(2E,3aalpha,4alpha(1E,3R*),5beta,6aalpha))-