(4S,5R,6R)-5-amino-4-guanidino-6-(1R,2R,3-trihydroxy-propyl)-5,6-dihydro-4H-pyran-2-carboxylic acid

(4S,5R,6R)-5-Amino-4-azido-6-(phenethyl-propyl-carbamoyl)-5,6-dihydro-4H-pyran-2-carboxylic acid methyl ester

(4S,5R,6R)-4-azido-5-methanesulfonylamino-6-(1S,2R,3-triacetoxy-propyl)-5,6-dihydro-4H-pyran-2-carboxylic acid methyl ester