there were significant correlations between the half-life for elimination of antipyrine from the body and the half-life for production of 4-oh antipyrine ( r equal 0.90 ) , as well as between the plasma half-life of aminopyrine and the half-life of 4-aminoantipyrine ( r equal 0.95 ) .
C0002586
aminopyrine
C0002696
aminoantipyrine