Hypoxia-selective agents derived from quinoxaline 1, 4-di-N-oxides

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%