| parent | Butabarbital | LP16055-3 | 
| child | Butabarbital [Mass/volume] in Serum or Plasma | 3418-1 | 
| child | Butabarbital [Mass/volume] in Serum or Plasma by Confirmatory method | 18384-8 | 
| child | Butabarbital [Presence] in Serum or Plasma | 3417-3 | 
| child | Butabarbital [Moles/volume] in Serum or Plasma | 25357-5 | 
| STATUS | NotStated | 
| PartDisplayName | en-US | Butabarbital | Serum or Plasma | Drug toxicology | 
LOINC Version: 2.78