（+）-（1-羟基-2,2,5,5-四甲基吡咯烷-3-基）甲硫代磺酸甲酯

高反应性的顺磁性氮氧化物硫醇特异性自旋标记。用于研究中以监测各种tau分子之间的分子间相互作用。还用于半胱氨酸的实验中，以添加一条氮氧化物侧链，该螺旋在螺旋表面和三级接触位点之间表现出更大的迁移率对比。

A paramagnetic nitroxide thiol-specific spin label that is highly reactive. Used in studies to monitor intermolecular interactions amongst various tau molecules. Also used in experiments with cysteine to add a nitroxide side chain that exhibits greater mobility contrast between helix surfaces and tertiary contact sites.