when the experiment was performed during the light span ( 08.00 and 14.00 h ) , the rats were highly sensitive to the phlogistic effect of carrageenin , the plasma levels of phenylbutazone and oxyphenbutazone were lower , and the anti-inflammatory effect of phenylbutazone , weaker .
C0030078
oxyphenbutazone
C0031463
phenylbutazone