| 摘要 |
Tripeptide derivatives, characterized by general formula: R1 - X - D-Arg - A - Arg - NH - R2 wherein R1 is hydrogen, alpha - or beta -naphtyl residue, lower alkyl residue which may be substituted with a carboxyl group, unsubstituted or substituted phenyl- or phenylalkyl residue. X is (I), (II), (III) or a single bond with the proviso that when R1 is hydrogen then and only then X is a single bond; A = Gly or Sar; R2 = an aromatic or heterocyclic residue which gives a compound R2-NH2 by enzymatic hydrolysis, which can be determined quantitatively; or disalts and trisalts of inorganic or organic acids thereof, process for their preparation and method for determination of serine proteases, especially Factor Xa; or components which can interact with serine proteases or zymogen forms thereof. |
