oxyphenbutazone had a modal plasma concentration between 1 and 2 micrograms/ml , a mean concentration of 2.07 micrograms/ml and a range of up to 13 micrograms/ml . gamma oh-phenylbutazone had a modal plasma concentration of less than 1 microgram/ml , a mean level of 1.39 micrograms/ml and a range of up to 7.32 micrograms/ml .
C0030078
oxyphenbutazone
C0031463
phenylbutazone