p. 2577 - 2589
(2007/10/02)p. 1874 - 1884
(2007/10/02)benzyl N-[(3S)-2-oxoazetidin-3-yl]carbamate
(3S)-(benzyloxycarbonyl)amino-1-(α-(acetoxy)isobutyl)-2-azetidinone
(3S)-(benzyloxycarbonyl)amino-α-isopropyl-2-oxoazetidine-1-acetic acid
methyl 2-<(3S)-3-benzyloxycarbonylamino-2-oxoazetidin-1-yl>-3-methylbut-2-enoate
benzyl chloroformate