however , distribution volumes , plasma half-lives and endogenous plasma clearances as well as removal kinetics in vitro of aminophenazone ( aminopyrine ) , propyphenazone , metamizole ( dipyrone ) , phenylbutazone and oxyphenbutazone as point to the efficacy of haemoperfusion with amberlite xad-4 resin .
C0031463
phenylbutazone
C0030078
oxyphenbutazone