3,4-dihydro-2H-pyran
(S)-4-[tert-Butoxycarbonyl-((S)-2-oxo-tetrahydro-furan-3-yl)-amino]-2-(tetrahydro-pyran-2-yloxy)-butyric acid benzyl ester
(S)-4-((S)-2-Oxo-tetrahydro-furan-3-ylamino)-2-(tetrahydro-pyran-2-yloxy)-butyric acid benzyl ester
(S)-4-Oxo-2-(tetrahydro-pyran-2-yloxy)-butyric acid benzyl ester
(S)-4-Hydroxy-2-(tetrahydro-pyran-2-yloxy)-butyric acid benzyl ester
(R)-4-(Benzyloxycarbonylmethyl-amino)-2-{[(R)-3-benzyloxycarbonyl-3-(tetrahydro-pyran-2-yloxy)-propyl]-tert-butoxycarbonyl-amino}-butyric acid benzyl ester
(S)-1-((S)-3-Benzyloxycarbonyl-3-{[(S)-3-benzyloxycarbonyl-3-(tetrahydro-pyran-2-yloxy)-propyl]-tert-butoxycarbonyl-amino}-propyl)-azetidine-2-carboxylic acid benzyl ester
2'-deoxymugineic acid
avenic acid A
(R)-2-{[(R)-3-Benzyloxycarbonyl-3-(tetrahydro-pyran-2-yloxy)-propyl]-tert-butoxycarbonyl-amino}-4-((R)-2-oxo-tetrahydro-furan-3-ylamino)-butyric acid benzyl ester