(2S,3R)-3-benzyloxycarbonylamino-2-hydroxyoctanoic acid
(2S,3R)-3-benzyloxycarbonylamino-2-hydroxyoctanoyl-L-phenylalanine benzyl ester
(2S,3R)-3-benzyloxycarbonylamino-2-hydroxyoctanoyl-L-leucine benzyl ester
(2S,3R)-3-benzyloxycarbonylamino-2-hydroxyoctanoyl-L-valine benzyl ester
(2S,3R)-3-benzyloxycarbonylamino-2-hydroxyoctanoyl-L-alanine benzyl ester