p. 599 - 603
(2007/10/02)(6R)-7t-amino-7c-methoxy-3-methyl-8-oxo-(6rH)-5-oxa-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester
2-tert-Butoxycarbonylamino-5-chlorocarbonyl-pentanoic acid 2,2,2-trichloro-ethyl ester
(R,S)-2-aminoadipic acid
DL-α-aminoadipic acid γ-benzyl ester
(2R,6R,7R)-7-Benzoylamino-3-methylene-8-oxo-5-oxa-1-aza-bicyclo[4.2.0]octane-2-carboxylic acid benzhydryl ester