Substituted derivatives of 20,21-dinoreburnamenine, their preparation process and the new intermediates thus obtained, their use as medicaments and the pharmaceutical compositions containing them

摘要

A compound and all possible racemic or optically active isomer forms, selected from the group consisting of compound of the formula ##STR1## wherein the substituents are defined as set forth in the application as filed. Useful for treating cerebral insufficiencies of anoxic or ischemic origin.