(1,2,4) triazolo 4,3-a quinoxaline derivatives as phosphodiesterase inhibitors

摘要

(1,2,4) triazolo [4,3-a] quinoxaline derivatives as phosphodiesterase inhibitors the present invention relates to (1,2,4) triazolo [4,3-a] quinoxaline derivatives of the formula ( (i) which are phosphodiesterase 2 and / or 10 inhibitors useful in the treatment of central nervous system disorders.