Use of a specific compound or a pharmaceutically acceptable salt thereof or a pharmaceutical composition containing the compound or the salt thereof in the production of a medicinal agent for treating dyscrasia a method for treating the disease which comprises administering the compound or a pharmaceutical composition containing the compound to a human or animal body use of a combination of the compound or a pharmaceutically acceptable salt thereof or a pharmaceutical composition containing the compound or the salt thereof and at least one second active ingredient and a pharmaceutical composition and a kit for use in the treatment of the disease, each of which comprises the compound or a pharmaceutically acceptable salt thereof.