Nippon Kagaku Zasshi, , vol. 75, p. 339 Chem.Abstr., , p. 10216 Journal of the Institute of Polytechnics, Osaka City University, Series C: Chemistry, , vol. 4, p. 100 Nippon Kagaku Zasshi, , vol. 75, p. 339 Chem.Abstr., , p. 10216