abstract |
Compounds of the formula WHEREIN R is hydrogen, methyl or acetyl, R' is hydrogen or methyl, and X is oxygen or sulfur, AND NON-TOXIC, PHARMACOLOGICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF; THE COMPOUNDS AS WELL AS THEIR SALTS ARE USEFUL AS OPIATE ANTAGONISTS, ANALGESICS AND ANTITUSSIVES.n[US3928359A] |