143199-54-6 4-Nitrobenzo-2-oxa-1,3-diazol-beta-ala-phe-5-oxapro-gly-t-butylester Glycine, N-(7-nitro-4-benzofurazanyl)-beta-alanyl-L-phenylalanyl-L-3-isoxazolidinecarbonyl-, 1,1-dimethylethyl ester Nbd-beta-ala-phe-opr-gly-otbu S 4404 S-4404