(4R,5R)-1,4,5,6-Tetrahydro-5-hydroxy-4-((E)-(3S)-3-hydroxy-1-octenyl)-1-phenylcyclopenta(b)pyrrole-2-valeric acid 79672-88-1 Cyclopenta(b)pyrrole-2-pentanoic acid, 1,4,5,6-tetrahydro-5-hydroxy-4-((1E,3S)-3-hydroxy-1-octenyl)-1-phenyl-, (4R,5R)- Cyclopenta(b)pyrrole-2-pentanoic acid, 1,4,5,6-tetrahydro-5-hydroxy-4-(3-hydroxy-1-octenyl)-1-phenyl-, (4R-(4alpha(1E,3S*),5beta))- Piriprost Piriprost [USAN:INN] Piriprostium [Latin] U-60,257