1. R. W. Middleton and J. Parrick, J. Heterocyclic Chem., in press (1985).
2. E. D. Clarke, R. W. Middleton and P. Wardman. In Proceedings 7th International Congress Radiation Research, J. J. Broerse, G. W. Barendsen, H. B. Kal and A. J. Van der Kogel, eds, Amsterdam, Martinus Nijhoff, 1983, Abstract A4-07.
3. Nitroaryl compounds as potential fluorescent probes for hypoxia. I. Chemical criteria and constraints
4. Nitroaryl compounds as potential fluorescent probes for hypoxia. II. Identification and properties of reductive metabolites
5. Obtained from Lancaster Synthesis Ltd., Morecambe, U. K.