Miller et al. (1997), that 5-(glutathion-S-yl)-α-methyldopamine and 5-(N-acetylcystein-S-yl)-α-methyldopamine produced similar effects to the parent compound...

Neurotoxicity Profile of 2,4,5-Trihydroxymethamphetamine and its 6-(N-Acetylcystein-S-yl) Conjugate". Chem Res Toxicol. 24 (6): 968–978. doi:10.1021/tx2001459...