| abstract |
Provided is a vasodilator that can dilate a blood vessel even in an environment where ROS are present.　This vasodilator includes the compound represented by formula (1) or a salt thereof. In formula (1), ring A and ring B may be the same or may differ from one another, and are each a pyrazole ring with a substituent group or a pyrazoline ring with a substituent group, and L is a saturated or unsaturated hydrocarbon group. |