p. 5241 - 5260
(2007/10/02)2-oxo-glutaric acid 1-p-nitrobenzyl ester
erythro, threo-DL-N-benzyloxycarbonyl-α-amino-2-(p-methoxybenzyl)-3-oxo-5-isoxazolidineacetic acid o-nitrobenzyl ester
N-benzyloxycarbonyl-α-(o-nitrobenzyl)-(Z)-α,β-dehydroglutanic-γ-(N-p-methoxybenzyl)hydroxamic acid
erythro-DL-N-benzyloxycarbonyl-α-amino-3-chloro-4,5-dihydro-5-isoxazoleacetic acid o-nitrobenzyl ester
threo-DL-N-benzyloxycarbonyl-α-amino-3-chloro-4,5-dihydro-5-isoxazoleacetic acid o-nitrobenzyl ester