we also sampled cerebrospinal fluid from under the window during baseline conditions and during application of the neurotransmitters , and we measured the concentrations of prostanoids ( 6-ketoprostaglandin f1 alpha , thromboxane b2 , prostaglandin f2 alpha , and prostaglandin e2 ) via radioimmunoassay .
C0033554
prostanoids
C0012472
prostaglandin e2