six prostanoids : 6-keto-pgf1 alpha , 6-keto-pge1 , txb2 , pgf2 alpha , pge2 and pgd2 were eluted isocratically with the solvent system of acetonitrile-water ( ph 3.0 ) ( 34:66 , v/v ) .
C0033554
prostanoids
C0012472
pge2