| 摘要 |
<p>The invention relates to novel peptide derivatives with the formula: R1-A1-A2-A3-A4-R2 or its salt, wherein R1 = H or a protective group; A1 = H, Ile, Leu or Val; A2 = Glu, Asp, Ser, Thr; A3 = Gly or Glyc; A4 = Arg or Lys; R2 = 4-nitro aniline with the proviso that A3 is Gly when A4 is Lys and that A3 is Glyc when A4 is Arg. The invention also discloses the process for the preparation of the peptide derivatives, the method for the determination of the bacterial endotoxins by the use of the invented peptide derivatives and the use of these derivatives for determination of bacterial endotoxins.</p> |
