... Heterocyclic Chem., 24, 949 (1987). ... REFERENCES AND NOTES [1] Part XXI: T. Hirota, M. Fukumoto, K. Sasaki, T. Namba, and S. Hayakawa, Heterocycles, 24, 143 (1986). ... [10] S. Kushner, H. Dalalian, JL Sanjurjo, FL Bach, Jr., SR Safir, VK Smith, Jr., and JH Williams, J. Am. ...