A compound selected from the group consisting of one or more of: (3aR,5R,6S,7R,7aR)-2-amino-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-(methylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(ethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(ethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5 R,6S,7R,7aR)-5-(hydroxymethyl)-2-(propylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-2-(butylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(allylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(allylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(2-fluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(2-fluoroethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(2,2-difluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(2,2-difluoroethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(2,2,2-trifluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-(2,2,2-trifluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-2-(2-acetoxyethylamino)-5-(acetoxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(2-hydroxyethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(ethyl(methyl)amino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(ethyl(methyl)amino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(methoxyamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; and (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-(methoxyamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol, or a pharmaceutically acceptable salt thereof. (3aR,5R,6S,7R,7aR)-2-amino-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-(methylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(ethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(ethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5 R,6S,7R,7aR)-5-(hydroxymethyl)-2-(propylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-2-(butylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(allylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(allylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(2-fluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(2-fluoroethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(2,2-difluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(2,2-difluoroethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(2,2,2-trifluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-(2,2,2-trifluoroethylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-2-(2-acetoxyethylamino)-5-(acetoxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(2-hydroxyethylamino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(ethyl(methyl)amino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; (3aR,5R,6S,7R,7aR)-2-(ethyl(methyl)amino)-5-(hydroxymethyl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol; (3aR,5R,6S,7R,7aR)-5-(acetoxymethyl)-2-(methoxyamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diyl diacetate; and (3aR,5R,6S,7R,7aR)-5-(hydroxymethyl)-2-(methoxyamino)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazole-6,7-diol, or a pharmaceutically acceptable salt thereof.