The present invention relates to a novel compound having plasminogen activator inhibitor-1 inhibitory activity, and a PAI-1 inhibitor comprising the compound as an active ingredient. The bag can be contained within the piercing member such that the bag is introduced to the vial when the vial adaptor is coupled with the vial. The size, shape, materials, and arrangement of the sun shade can vary according to user preferences or the intended manner or place of use.