p-Fluorobutyryl fentanyl:MCnc:Pt:Urine:Qn
p-fluorobutyryl fentanyl:mcnc:pt:urine:qn
p-Fluorobutyryl fentanyl:Mass Concentration:To identify measures at a point in time:Urine:Quantitative
p-fluorobutyryl fentanyl:mass concentration:to identify measures at a point in time:urine:quantitative