Compounds of formula (1): Z′-CO-A-B—NH-Z (I) wherein: Z is H or an amino protecting group; Z′ is OH, a protected or activated hydroxyl group or Cl; A is an optionally substituted C
5-6
arylene group; and B is an optionally substituted C
5-6
arylene group.
公式(1)的化合物:Z'-CO-A-B—NH-Z(I),其中:Z为H或
氨保护基;Z'为OH,受保护或活化羟基或Cl;A为可选取代的C5-6芳基烃基;B为可选取代的C5-6芳基烃基。