(E)-(3aR,4R,5R,6aS)-delta-Cyano-3,3a,4,5,6,6a-hexahydro-5-hydroxy-4-((E)-(3S,4RS)-3-hydroxy-4-methyl-1-octenyl)-2H-cyclopenta(b)furan-delta(sup 2,delta)-valeric acid 71097-83-1 Nileprost Nileprost [INN] Nileprostum [INN-Latin] ZK 34798