rel-(2R,3S,11bS)-1,3,4,6,7,11b-Hexahydro-2-hydroxy-9,10-di(methoxy-d3)-ฮฑ-methyl-2H-benzo[a]quinolizine-3-propanoic acid,rel-(2R,3S,11bS)-1,3,4,6,7,11b-Hexahydro-2-hydroxy-9,10-di(methoxy-d3)-ฮฑ-methyl-2H-benzo[a]quinolizine-3-propanoic acid,Tetrabenazine Metabolite