Disclosed is 8-Cyclopropy1-3-[2-(3-fluorophenypethyl]-7,8-dihydro-3H-[1,3]oxazino [6,5-g][1,2,3]benzotriazine-4,9-dione, or a pharmaceutically acceptable addition salt of an acid or base thereof. Also disclosed is the use of the said compound for treating schizophrenia, Parkinsons disease, ADHD or Alzheimers disease.