Quinazolinde-dione compounds, process for production thereof and
申请人:Masayuki Ishikawa
公开号:US04405623A1
公开(公告)日:1983-09-20
A 5,6,7-substituted-2,4(1H,3H)-quinazolinedione compound of the formula (I), ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, A and B are as defined in claim 1 and its acid addition salt; and a vasodilating and hypotensive composition containing the aforesaid compound.