tricyclic compounds as kat ii inhibitors

摘要

patent summary for: "tricyclic compounds as kat ii inhibitors". The present invention relates to compounds of formula I: wherein R 1, R 2, X 1, Y 1, Z 1, and Z 2 are as defined herein, and pharmaceutically acceptable salts thereof are described as useful for treating associated cognitive deficits. with schizophrenia and other psychiatric, neurological and / or neurological disorders in mammals, including humans.