1. Shealy, Y.F. et al, et al, J. Org. Chem.,1962, 27, 2150 (synth)
2. Fioretta, M.C., Pharmacol. Res. Commun., 1975, 7, 481 (rev)
3. Beal, D.D., Diss. Abstr. Int. B,1978, 38, 4720 (metab,pharmacol)
4. Zambito, A.J. et al,Nucl. Acid Chem., 1978, 1, 3 (synth)
5. Freeman, H.C. et al,Acta Crystallogr., Sect. B, 1979, 35, 2045, 2051 (tryst struct)