tetrabenazine ( 2-oxo-3-isobutyl-9,10-dimethoxy-1,2,3,4,6,7 hexahydro-11 bh-benzo ( a ) quinolizine ) and dihydrotetrabenazine ( 2-hydroxy derivative ) are inhibitors of catecholamine uptake by the chromaffin granules of adrenal medulla .
C0039623
tetrabenazine
C0034429
quinolizine