(5R,6S,7S,8R)-6,7-bis(benzyloxy)-5-benzyloxymethyl-2-bromo-8-(t-butyldimethylsilyloxy)-5,6,7,8-tetrahydroimidazo[1,2-a]pyridine

(5R,6S,7S,8R)-6,7-bis(benzyloxy)-5-benzyloxymethyl-2,3-dibromo-8-(t-butyldimethylsilyloxy)-5,6,7,8-tetrahydroimidazo[1,2-a]pyridine

2,3,5-tri-O-benzyl-1-O-trityl-D-xylitol

2,3,5-tri-O-benzyl-4-methanesulfonyl-1-O-trityl-D-xylitol

4-azido-2,3,5-tri-O-benzyl-4-deoxy-1-O-trityl-L-arabinitol