| abstract |
The present invention relate to a drug for treating circulatory insufficiency containing a benzopyran derivative represented by the following general formula (I): n n n n n n n n n n and/or a physiologically acceptable salt thereof as an active ingredient, wherein R 1 is an alkyl group having 1 to 10 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms; and any one of R 2 , R 3 , R 4 and R 5 is a hydroxyl group, an alkoxy group, an alkenyloxy group, an alkoxy group substituted with a hydroxyl group, or an alkoxy group substituted with a carboxy group, and the others are hydrogen atoms. |