BACKGROUND OF THE INVENTION
Much of the information set forth herein has been published. See Barton, J. K. et al., J. Am. Chem. Soc., 1984, 106: 2172-2176 (Apr. 6, 1984); Barton, J. K. and Raphael, A., J. Am. Chem. Soc., 1984, 106: 2466-2468 (Apr. 18, 1984); Barton, J. K. et al., Proc. Natl. Acad.