There is disclosed a resist underlayer film composition of a multilayer resist film used in lithography including a fullerene derivative having a carboxyl group protected by a thermally labile group and an organic solvent. Since this fluorescent substance converts the ultraviolet light to the visible light, a binding efficiency of the ultraviolet light to the fluorescent substance is enhanced in either one of a center light emitting type and UV light emitting type of light emitting elements. The floor lid comprises a first, upwardly openable end that faces the vehicle door and a second, opposite end that, at least when the floor lid is in a closed position, is firmly attached to the vehicle. A portion of the cylindrical plug may extend past the second opening when inserted into the housing. The method results in high-level, long-term expression of reporter genes and enhanced cardiac function in hamster models of heart disease.