A hybrid vehicle system facilitates operator control over electric power generation and use. The compounds contain a substituted adenine analogue moiety comprising 2-amino-6–9H-purin-9-yl. Alternatively counter-wound spiral coils placed adjacent to each other on the outer surface of two concentric cylindrical surfaces that surround the NMR sample minimize the electric field over the sample region. 66 times or less of the difference between the Eg of the first cladding layer and the Eg of the active layer. An electrical connection auxiliary member, such as a through-hole formed at the exposed portion or a conductive inorganic oxide film formed on the corrosion resistant metal wire and the exposed portion, is formed to electrically connect the corrosion resistant metal wire and the non-corrosion resistant metal wire. The underframe is integrally formed by casting.