. . "The 5- to 7-membered hetero ring or condensed hetero ring containing such X103, may further be substituted by a substituent selected from the group consisting of a halogen atom such as a chlorine atom, a bromine atom or a fluorine atom; a hydroxyl group; a mercapto group; a nitro group; a cyano group; a carboxyl group; a sulfonic group; a phosphono group; a linear, branched or cyclic alkyl group s" . . .