(5R,6S,7S,8R)-6,7-bis(benzyloxy)-5-benzyloxymethyl-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

(5R,6S,7S,8S)-6,7-bis(benzyloxy)-5-benzyloxymethyl-8-(t-butyldimethylsilyloxy)-5,6,7,8-tetrahydro-2-(3-hydroxy-2-oxopropyl)imidazo[1,2-a]pyridine