POTENTIAL ANTIRADIATION DRUGS. I. SUGAR ETHYLENIMINES AND EPISULFIDES.' Sir : Epoxides are among the most versatile inter- mediates in rare sugar synthesis2 In particular, those epoxides that are fused to sugar rings of either the pyranose or furanose form provide path- ways for certain transformations that would otherwise be hindered or prevented by the very low SN ~ reactivity of the secondary sulfonate esters or secondary halides in ...