Alfentanil ‘inn’, anileridine ‘inn’, bezitramide ‘inn’, bromazepam ‘inn’, difenoxin ‘inn’, diphenoxylate ‘inn’, dipipanone ‘inn’, fentanyl ‘inn’, ketobemidone ‘inn’, methylphenidate ‘inn’, pentazocine ‘inn’, pethidine ‘inn’, pethidine ‘inn’ intermediate a phencyclidine ‘inn’‘pcp’, phenoperidine ‘inn’, pipradol ‘inn’, piritramide ‘inn’, propiram ‘inn’ and trimeperidine ‘inn’, and salts thereof 5 4 3 2 1