The present invention provides a new labeling reagent for preparing modified oligonucleotides and processes for their production wherein these oligonucleotides contain at least once the structure P═N—SO
2
-benzole-L-M-X, characterized in that L is either —(CH
2
)n- or polyethylene glycol, M is selected from a group consisting of —NH—, —O—, —S—, and —COO—, and X is either a protecting group or a detectable unit. L is preferably either —(CH
2
)n- or polyethylene glycol.
本发明提供了一种新的标记试剂,用于制备修饰寡核苷酸,并提供了其生产方法,其中这些寡核苷酸至少包含一次结构P═N—SO2-苯基-L-M-X,其特征在于L为—(
CH2)n-或聚
乙二醇,M选自—NH—、—O—、—S—和—COO—的一组,X为保护基或可检测单元。L最好是—( )n-或聚
乙二醇。