A compound represented by the following general formula: [wherein R represents hydrogen, a chain or cyclic hydrocarbon group optionally having a substituent, or a heterocyclic group optionally having a substituent; and Ar 1 is selected from the group consisting of: a 4-(pyridin-2-ylmethoxy)phenyl group; a 2-methoxy-4-(pyridin-2-ylmethoxy)phenyl group; a 2-[2-(piperidin-1-yl)ethoxy]-4-(pyridin-2-ylmethoxy)phenyl group; a 2-(2-morpholinoethoxy)-4-(pyridin-2-ylmethoxy)phenyl group; a 2-(2-pyrrolidinoethoxy)-4-(pyridin-2-ylmethoxy)phenyl group; a 2-[2-(4-methylpiperazino)ethoxy]-4-(pyridin-2-ylmethoxy) phenyl group; a 3-methoxy-4-(pyridin-2-ylmethoxy)phenyl group; a 2-hydroxy-4-(pyridin-2-ylmethoxy)phenyl group, a 3-(pyridin-2-ylmethoxy)phenyl group, a 2-methoxy-3-(pyridin-2-ylmethoxy)phenyl group, a 4-methoxy-3-(pyridin-2-ylmethoxy)phenyl group, a 3-methoxy-5-(pyridin-2-ylmethoxy)phenyl group, a 2-methoxy-5-(pyridin-2-ylmethoxy)phenyl group, a 2-(pyridin-2-ylmethoxy)phenyl group, a 4-methoxy-2-(pyridin-2-ylmethoxy)phenyl group, a 5-methoxy-2-(pyridin-2-ylmethoxy)phenyl group, a 2-nitro-5-(pyridin-3-ylmethoxy)phenyl group, a 4-diethylamino-2-(pyridin-3-ylmethoxy)phenyl group, or a 2-methoxy-2-(1-pyrrolylmethoxy)phenyl group and Ar 2 is an unsubstituted or substituted bicyclic heterocyclic group which is selected from the group consisting of: an indol-2-yl group; an indol-3-yl group; an indol-4-yl group; an indol-5-yl group; an indol-6-yl group; an indol-7-yl group; a benzotriazol-5-yl group; a benzimidazol-5-yl group; a quinoxalin-6-yl group; a benzofuran-2-yl group; a benzothiophen-2-yl group; a 1H-indazol-5-yl group; a 7-azaindol-3-yl group; a quinolin-2-yl group; a quinolin-5-yl group; a quinolin-8-yl group; a 1,4-benzodioxan-6-yl group; a 1,3-benzodioxol-5-yl group; a chromon-3-yl group; a coumarin-6-yl group; a 7-methoxycoumarin-4-yl group; and a 4-methoxycoumarin-6-yl group, wherein the substituent of the substituted bicyclic heterocyclic group of Ar 2 is selected from the group consisting of: a methyl group; an ethyl group; a benzyl group; an acetyl group; a benzoyl group; a tert-butoxycarbonyl group; a methylsulfonyl group; a p-toluenesulfonyl group; a hydroxy group; and a nitro group] or a salt thereof. [wherein R represents hydrogen, a chain or cyclic hydrocarbon group optionally having a substituent, or a heterocyclic group optionally having a substituent; and Ar 1 is selected from the group consisting of: a 4-(pyridin-2-ylmethoxy)phenyl group; a 2-methoxy-4-(pyridin-2-ylmethoxy)phenyl group; a 2-[2-(piperidin-1-yl)ethoxy]-4-(pyridin-2-ylmethoxy)phenyl group; a 2-(2-morpholinoethoxy)-4-(pyridin-2-ylmethoxy)phenyl group; a 2-(2-pyrrolidinoethoxy)-4-(pyridin-2-ylmethoxy)phenyl group; a 2-[2-(4-methylpiperazino)ethoxy]-4-(pyridin-2-ylmethoxy) phenyl group; a 3-methoxy-4-(pyridin-2-ylmethoxy)phenyl group; a 2-hydroxy-4-(pyridin-2-ylmethoxy)phenyl group, a 3-(pyridin-2-ylmethoxy)phenyl group, a 2-methoxy-3-(pyridin-2-ylmethoxy)phenyl group, a 4-methoxy-3-(pyridin-2-ylmethoxy)phenyl group, a 3-methoxy-5-(pyridin-2-ylmethoxy)phenyl group, a 2-methoxy-5-(pyridin-2-ylmethoxy)phenyl group, a 2-(pyridin-2-ylmethoxy)phenyl group, a 4-methoxy-2-(pyridin-2-ylmethoxy)phenyl group, a 5-methoxy-2-(pyridin-2-ylmethoxy)phenyl group, a 2-nitro-5-(pyridin-3-ylmethoxy)phenyl group, a 4-diethylamino-2-(pyridin-3-ylmethoxy)phenyl group, or a 2-methoxy-2-(1-pyrrolylmethoxy)phenyl group and Ar 2 is an unsubstituted or substituted bicyclic heterocyclic group which is selected from the group consisting of: an indol-2-yl group; an indol-3-yl group; an indol-4-yl group; an indol-5-yl group; an indol-6-yl group; an indol-7-yl group; a benzotriazol-5-yl group; a benzimidazol-5-yl group; a quinoxalin-6-yl group; a benzofuran-2-yl group; a benzothiophen-2-yl group; a 1H-indazol-5-yl group; a 7-azaindol-3-yl group; a quinolin-2-yl group; a quinolin-5-yl group; a quinolin-8-yl group; a 1,4-benzodioxan-6-yl group; a 1,3-benzodioxol-5-yl group; a chromon-3-yl group; a coumarin-6-yl group; a 7-methoxycoumarin-4-yl group; and a 4-methoxycoumarin-6-yl group, wherein the substituent of the substituted bicyclic heterocyclic group of Ar 2 is selected from the group consisting of: a methyl group; an ethyl group; a benzyl group; an acetyl group; a benzoyl group; a tert-butoxycarbonyl group; a methylsulfonyl group; a p-toluenesulfonyl group; a hydroxy group; and a nitro group]