In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.

[EX Q]: Effect of nicotine pretreatment on arsenic-induced oxidative stress in male Wistar rats.
[EX A]: nicotine

[EX Q]: Mechanistic Aspects of hSOD1 Maturation from the Solution Structure of Cu(I) -Loaded hCCS Domain 1 and Analysis of Disulfide-Free hSOD1 Mutants.
[EX A]: Cu(I)

[EX Q]: Transdermal selegiline for the treatment of major depressive disorder.
[EX A]:
selegiline