Morphine derivatives with antianalgesic action.

Abstract

Summary A series of N-alkyl substituted derivatives of morphine has been synthesised and examined for analgesic and antianalgesic action. Several of these compounds have shown powerful antianalgesic activity, N-propylnormorphine and the diacetyl and dipropionyl derivatives of N-allylnormorphine (nalorphine) being about as active as nalorphine.