these 5-halogenated imidazole nucleosides were treated with several nucleophiles such as ammonia , hydroxylamine , and hydrogen sulfide to provide , respectively , 5-haloimidazole-4-carboxamide , 5-haloimidazole-4-carboxamidoxime , and 5-haloimidazole-4-thiocarboxamide ribonucleosides .
C0028621
nucleosides
C0035546
ribonucleosides