The object of the present invention is to provide a potassium channel opener having benzofuroindole skeleton representing the following formula (I) wherein, R
1
is hydrogen, R
2
is CF
3
, R
3
is COOH, R
4
is hydrogen, R
5
is hydrogen or chloride and R
6
is hydrogen or chloride.
本发明的目的是提供一种具有
苯并呋喃吲哚骨架的
钾通道开放剂,其表示为以下公式(I):其中,R1为氢,R2为
CF3,R3为COOH,R4为氢,R5为氢或
氯,R6为氢或
氯。