The present invention provides novel fluorescein derivative compounds having fluorescence spectrum and quantum yield characteristics similar to those of fluorescein. The compounds are readily synthesized and purified and are readily soluble in water at self-quenching concentrations. Significantly, due to the presence of polar polyhydroxy group substituents and the absence of metal-chelating groups, these fluorescein derivatives are susceptible to minimal leakage across liposome membranes and have fluorescence characteristics minimally sensitive to the presence of metal ions. Compounds of the invention are thus exceptionally suitable for use in the development of highly storage stable liposome preparations to be employed in immunolytic assays involving human body fluid samples.
本发明提供了一种新型
荧光素衍
生物化合物,其荧光光谱和量子产率特性类似于
荧光素。这些化合物易于合成和纯化,并且在自猝灭浓度下易于溶于
水。值得注意的是,由于存在极性多羟基基团取代物且缺乏
金属螯合基团,这些
荧光素衍
生物对脂质体膜的渗漏最小,并且对
金属离子的存在的荧光特性最不敏感。因此,本发明的化合物非常适用于开发高储存稳定性的脂质体制剂,用于人体液体样品的免疫分析。