参考文献

Kita, Yasuyuki; Takeda, Yoshifumi; Okuno, Takayuki; Egi, Masahiro; Iio, Kiyosei; Kawaguchi, Ken-Ichi; Akai, Shuji Chemical and Pharmaceutical Bulletin, 1997 , vol. 45, # 12 p. 1887 - 1890