(2S,3S,4R,5R)-3,4-dihydroxy-5-[6-(methoxyamino)-2-(2-pyridin-2-ylethynyl)purin-9-yl]-N-methyloxolane-2-carboxamide
(2S,3S,4R,5R)-3,4-dihydroxy-5-[6-(methoxyamino)-2-[2-(2-pyridyl)ethynyl]purin-9-yl]-N-methyl-tetrahydrofuran-2-carboxamide
(2S,3S,4R,5R)-3,4-dihydroxy-5-[6-(methoxyamino)-2-[2-(2-pyridyl)ethynyl]-9-purinyl]-N-methyl-2-tetrahydrofurancarboxamide
(2S,3S,4R,5R)-3,4-dihydroxy-5-[6-(methoxyamino)-2-(2-pyridin-2-ylethynyl)purin-9-yl]-N-methyl-oxolane-2-carboxamide