BP
British Pharmacopoeia
famotidine degradation impurity 1 (BP 655)
methylphenobarbital (BP 662)
fentanyl citrate (BP 665)
domperidone maleate (BP 669)
norfloxacin (BP 670)
droperidol (BP 675)
flecainide acetate (BP 676)
sulpiride (BP 679)
2-cyano-1-methyl-3-[2-(5-methylimidazol-4-ylmethylsulfinyl)ethyl]guanidine (BP 478)