3,5-Diaza-1-azonia-7-phosphatricyclo[3.3.1.13,7]decane, 1-(4-sulfobutyl)-, inner salt

4-(1,3,5-Triaza-7-phosphaadamantan-1-ium-1-yl)butane-1-sulfonate can be useful in the synthesis of extended fluorescent uridine analogues and study their of photophysical properties and selective interaction with BSA protein.