Okuda; Robison Journal of Organic Chemistry, 1959 , vol. 24, p. 1008,1010 Full Text Show Details Sakamoto, Takao; Satoh, Chisato; Kondo, Yoshinori; Yamanaka, Hiroshi Heterocycles, 1992 , vol. 34, # 12 p. 2379 - 2384