among various prostaglandins tested , pge2 and pge1 were most potent and other prostaglandins were also active with the potency decreasing in the following order : pgf1 alpha greater than or equal to pgf2 alpha greater than or equal to pga2 greater than or equal to pgb2 greater than pga1 greater than or equal to pgb1 .
C0012472
pge2
C0033554
prostaglandins