The present invention provides novel 13,14-dihydro-inter-3,7-inter-m-phenylene-4,5,6-trinor-3-oxa-19-oxo-PGF.su b.1 compounds, which are useful for a variety of pharmacological purposes, e.g., antiasthmatic indications.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
The present invention particularly relates to: 
13,14-dihydro-3,7-inter-m-phenylene-4,5,6-trinor-3-oxa-19-oxo-PGF.sub.1 
.alpha.; and 
13,14-dihydro-3,7-inter-m-phenylene-4,5,6-trinor-3-oxa-15(R)-19-oxo-PGF.sub 
.1 .alpha..