NEW BENZOB CHROMENO-NAPHTHYRIDIN -7- ONE AND PYRAN 2'3';7,8 QUINO2,3-B QUINOXALIN -7- ONE COMPOUNDS, PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

7,8]quino[2,3-b]quinoxalin-7-one compounds, to a process for their preparation and to pharmaceutical compositions containing them./