(3R,5R,6S)-7-benzyloxy-6-benzyloxycarbonylamino-3,5-bis(tert-butyl-dimethylsilanyloxy)-heptanoic acid methyl ester

(-)-galantinic acid

(5S,6S)-7-benzyloxy-6-benzyloxycarbonylamino-5-hydroxy-3-oxo-heptanoic acid tert-butyl ester