The invention relates to novel derivatives of 14,15-dihydro 20,21-dinoreburnamenin-14-ol, having formula (I) in which R represents a radical —AR′ wherein A represents a heteroatom and R′ represents a group selected from the group comprising linear or branched C1-C6 alkyl radicals, C2-C6 alkenyls, C2-C6 alkynyls, arylalkyls; esters comprising the formula —R1— CO—O—R2; amides comprising the formula —R3—CO—NZY, wherein Y and Z together can form a cycloalkyl radical or a heterocyclic radical, optionally substituted by one or more alkyl radicals; a radical selected from the group comprising alkyl radicals, alkenyls or alkynyls, substituted by at least one amine with formula —NZY; or one of the pharmaceutically-acceptable salts thereof, including the isomers, enantiomers and diastereoisomers thereof and mixtures thereof. The invention also relates to the use of the novel derivatives for the preparation of a pharmaceutical composition which is intended, in particular, for the treatment and/or prevention of depression, sleep-wake cycle disorders and symptomatic frontal disorders in cognitive components among humans.