<unk>  (INN), levomethadyl acetate (USAN), OrLAAM (trade name) or levo-α-acetylmethadol (LAAM) is a synthetic opioid similar in structure to methadone. It has a long duration of action due to its active metabolites.
Levacetylmethadol
Acetylmethadol
Betamethadol
Nalorphine
Alphamethadol
Nalorphine dinicotinate
Desmetramadol
Eptazocine