when levels of prostaglandins ( pgs ) and thromboxane ( tx ) b2 were quantified by gas chromatography-mass spectrometry as their methyl ester ( me ) -dimethylisopropylsilyl ( dmips ) ether or me-methoxime-dmips ether derivatives , 6-keto-pgf1 alpha reached the maximum at 1 hr after carrageenin , then pge2 and txb2 showed peaks at 3 hr and waned off before 9 hr .
C0033554
prostaglandins
C0012472
pge2