A pharmaceutical composition comprising a compound having Formula (I) or a pharmacologically acceptable salt thereof as an active ingredient: [wherein, R 1 is, for example, a C 6 -C 10 aryl group which may be substituted with one group or more than one group selected from substituent group ±; R 2 is, for example, a C 6 -C 10 aryl group which may be substituted with one group or more than one group selected from substituent group ±; and X is, for example, a hydroxyl group or a C 1 -C 6 alkoxy group].