Prostaglandins are a family of 20-carbon fatty acids found in virtually all mammalian cells 1,2. These are highly biologically active and have been implicated in the mediation of many physiological responses 3,4. Natural prostaglandins possess an allylic, secondary alcohol group at C-15 position. This alcohol group can be oxidized into a ketone in the presence of 15hydroxyprostaglandin dehydrogenase and this process is very rapid in vivo in animals and man 5-7. The oxidation to 15-ketoprostaglandins leads to the inactivation of prostaglandin