(+-)-Methyl (Z)-7-((1R,2R,3R)-3-hydroxy-2-((E)-(4RS)-4-hydroxy-4-methyl-1-octenyl)-5-oxocyclopentyl)-4-heptenoate 81026-63-3 ENISOPROST Enisoprost [USAN:INN] Enisoprostum [Latin] Prosta-4,13-dien-1-oic acid, 11,16-dihydroxy-16-methyl-9-oxo-, methyl ester, (4Z,11alpha,13E)-(+-)- SC 34301