methyl (E)-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3R)-3-hydroxy-4,4-dimethyloct-1-enyl]-5-oxocyclopentyl]hept-2-enoate methyl (E)-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3R)-3-hydroxy-4,4-dimethyl-oct-1-enyl]-5-oxo-cyclopentyl]hept-2-enoate (E)-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3R)-3-hydroxy-4,4-dimethyloct-1-enyl]-5-oxocyclopentyl]hept-2-enoic acid methyl ester (E)-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3R)-3-hydroxy-4,4-dimethyl-oct-1-enyl]-5-keto-cyclopentyl]hept-2-enoic acid methyl ester Preglandin Gemoprost GEMEPROST D02073 Gemeprost (JAN/USAN) Preglandin (TN)