1. “Chung-kuo Tu-nung-Yao Chih,” Koh-süeh Chu-pan Shê, Peking, 1959, p. 172.
2. K. Kimura and T. Kimura, “Medical Plants of Japan in Colour,” Hoikusha Publishing Co., Ltd., Osaka, Japan, 1975, p. 115.
3. “International Tables for X-ray Crystallography,” Vol. III, Kynoch Press, Birmingham, England, 1962.
4. The following programs were used during the course of the structure analysis: FANDER, structure factor calculation and Fourier synthesis, Y, Iitaka; HBLS, structure factor calculation and block-diagonal least-squares refinement, T. Ashida; BOND, bond distances and angles, Y. Iitaka: ORTEP, stereoscopic drawings. All computations were performed on a FACOM 230–75 computer.