15-(4-Propylcyclohexyl)-16,17,18,19,20-pentanor-9-deoxy-9,6-nitrilo-pgf1 methyl ester 72520-05-9 Cyclopenta(b)pyrrole-2-pentanoic acid, 3,3a,4,5,6,6a-hexahydro-5-hydroxy-4-(3-hydroxy-3-(4-propylcyclohexyl)-1-propenyl)-, methyl ester OP 2507 OP-2507