Synonyms: Cyclopentaneheptanoicacid, 3-hydroxy-5-oxo-2-(3-oxooctyl)- (7CI); Cyclopentaneheptanoic acid,3-hydroxy-5-oxo-2-(3-oxooctyl)-, stereoisomer (8CI); 11a-Hydroxy-9,15-diketoprostanoicacid; 11a-Hydroxy-9,15-dioxoprostanoicacid; 13,14-Dihydro-15-keto-PGE1; 13,14-Dihydro-15-keto-PGE1;13,14-Dihydro-15-ketoprostaglandin E1; 13,14-Dihydro-15-oxo-PGE1;15-Oxodihydroprostaglandin E1; 15-keto-13,14-Dihydro-PGE1;15-keto-13,14-Dihydroprostaglandin E1; Dihydro-15-ketoprostaglandin E1; U 21002