4) S. Nishibe, S. Hisada, and I. Inagaki, Yakugaku Zasshi, 94, 522 (1974).
5) N. S. Bhacca, D. P. Hollis, L. F. Johnson, and E. A. Pier, “NMR Spectra Catalog,” Vol. 2, Varian Associates, Palo Alto, California (1963), Spectr. No. 679.
6) T. Okamoto, T. Murakami, and H. Itokawa, “Tennenbutsu Kagaku,” Hirokawa Publishing Co., Tokyo (1963), p. 114.