Sankanshikikagobutsunopiperijiridenjudotainoseiho

摘要

Pharmaceutical compositions and a method of producing antipsychotic activity without extrapyramidial symptoms by administering internally a nontoxic effective quantity of a tricyclic piperidylidene derivative to an animal host. The active ingredients are prepared from an appropriately substituted xanthone, thioxanthone or dibenxoxepinons by reaction with an N-substituted piperidyl magnesium halide. Certain of the piperidylidene derivatives are novel compounds per se.