(5R,6R,7S,8S)-8-amino-5,6,7,8-tetrahydro-5-(hydroxymethyl)[1,2,4]triazolo[4,3-a]pyridine-6,7-diol

2-O-acetyl-5-amino-3,4,6-tri-O-benzyl-5-deoxy-D-mannonothiolactam

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

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

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