1. F. Bohlmann, T. Burkhardt and C. Zdero, “Naturally Occurring Acetylenes,” Academic Press, London and New York, 1973, pp. 123~136.
2. K. Kawazu, A. Nakamura, C. Nishio, K. Koshimizu and T. Mitsui, 1969 Annual Meeting of Agricultural Chemical Society of Japan, April 1969, p. 130.