The disclosure relates to pharmacotherapy of a psychiatric disorder which is schizophrenia and/or anxiety, wherein schizophrenia includes schizophrenia related disorders such as brief psychotic disorders, delusional disorders, schizoaffective disorders, and schizophreniform disorders, and anxiety includes panic disorders, obsessive-compulsive disorders (OCD), post-traumatic stress disorders (PTSD), social phobia or social anxiety disorders, specific phobia, and generalized anxiety disorders (GAD). The compounds of the disclosure are useful for the treatment of the above psychiatric disorders alone or in combination with other therapeutical agents effective in the treatment of schizophrenia and/or anxiety disorders.