[Comparative study of some nicotinic esters and some salts of codeine and morpholinoethylmorphine].
D003061:Codeine / Q000031:analogs & derivatives; D004952:Esters; D009022:Morphine Derivatives; D012492:Salts
D004952:Esters; D009022:Morphine Derivatives; D012492:Salts; D003061:Codeine
CODEINE/related compounds; MORPHINE/related compounds