Abstract: A compound has a tetra-hydroquinoline skeleton, the compound having inhibitory action against ferroptosis, and exerting therapeutic or preventive effect on diseases, disorders or syndromes related to ferroptosis inhibition, such as multiple sclerosis.

Abstract: The present invention provides a game system which utilizes player's experience efficiently in a competition game to make the competition game more entertaining. A category/style selecting unit 1606 of a terminal 1 enables a player to select one of categories and styles of quizzes selectable for the player who played an academy stage (#5), and sends the category and style of quiz and a difficulty-level of quiz selectable for the player to a center server 3 (#6). A battle stage quiz deciding unit 3616 of the center server 3 selects a predetermined number of quizzes which are in the category and style and the difficulty-level sent from the terminal 1 from a Q&A information storing unit 3625 and decides the quizzes to be set in a battle stage (#7).