subcutaneously , it was over 100 times more active than codeine , dextromethorphan and dl-pentazocine and about 20 times more active than morphine in the guinea-pig , while in the dog it was 100 , 10 and 4 times more active than codeine , dl-pentazocine and morphine , respectively .
C0009214
codeine
C0026549
morphine