p. 5171 - 5174
(2008/03/14)p. 1513 - 1520
(2007/10/02)glycine benzyl ester trifluoroacetic salt
3-Bromopropionyl chloride
glycine benzyl ester p-toluenesulfonic acid salt
C23H25(2)HN2O6
(2S,3R)-4-nitrobenzyl 5-(4-bromophenylsulphonylamino)-3-hydroxy-2-(2-oxoazetidin-1-yl)valerate
threo-4-nitrobenzyl 5-(4-bromophenylsulphonylamino)-3-hydroxy-2-(2-oxoazetidin-1-yl)valerate
threo-benzyl-N5-benzyloxycarbonylamino-3-hydroxy-2-(2-oxoazetidin-1-yl)valerate
erythro-benzyl 5-benzyloxycarbonylamino-3-hydroxy-2-(2-oxoazetidin-1-yl)valerate