(5R,6R,7R,8S)-8-amino-5,6,7,8-tetrahydro-5-(hydroxymethyl)imidazo[1,2-a]pyridine-6,7-diol

(5R,6R,7R,8S)-6,7-bis(benzyloxy)-5-[(benzyloxy)methyl]-5,6,7,8-tetrahydrotriazolo[4,3-a]pyridin-8-ol

(5R,6R,7S,8S)-8-acetoxy-6,7-bis(benzyloxy)-5-[(benzyloxy)methyl]-5,6,7,8-tetrahydrotriazolo[1,2-a]pyridine

(5R,6R,7S,8S)-6,7-bis(benzyloxy)-5-[(benzyloxy)methyl]-5,6,7,8-tetrahydro-8-[(methylsulfonyl)oxy][1,2,4]triazolo[4,3-a]pyridine

(5R,6R,7S)-6,7-Bis-benzyloxy-5-benzyloxymethyl-6,7-dihydro-5H-imidazo[1,2-a]pyridin-8-one