申请人:Tsuzuki Yasuyuki
                            
                            
                                公开号:US20110034435A1
                            
                            
                                公开(公告)日:2011-02-10
                            
                            A compound of formula (A); wherein ring A is an aromatic ring or a heteroaromatic ring; R
1
is independently halogen, cyano, etc., each of X
1
, X
2
and X
3
is CR
2
or nitrogen, R
2
is independently hydrogens, etc., n is 0, 1, 2, 3 or 4; -D-Y is —O—CH
2
COOH, etc, and G is a substituted amino, a substituted heterocyclic group, etc, or a pharmaceutical acceptable salt thereof, has activities of opening BK channels.