C1-4 alkanoylphenyl-esters of 5-hydroxy-PGI1, Δ4 -PGI1, and 4-oxo-PGI1 compounds
The present application is a divisional application of Ser. No. 933,329, filed Aug. 14, 1978, now issued as U.S. Pat. No. 4,180,657, on Dec. 25, 1979. 
    
    
     The present invention relates to prostaglandin analogs for which the essential material constituting a disclosure therefor is incorporated by reference here from U.S. Pat. No. 4,180,657, issued Dec. 25, 1979.