The invention relates to a compound of formula (I) wherein R1; R2, R3and R4are as defined in the description. The invention also relates to europium (III) complexes obtained from a compound of formula (I), or from a complexing agent including said compound, and to the use of such complexes to label organic or biological molecules.
本发明涉及一种式为(I)的化合物,其中R1,R2,R3和R4如描述中所定义。本发明还涉及从式为(I)的化合物或包括该化合物的络合剂获得的
铕(III)配合物,以及使用这种配合物标记有机或
生物分子的方法。