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.

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


[Q]: Guidance on the use of miglustat for treating patients with type 1 Gaucher disease.
[A]: miglustat


[Q]: New triterpenoids from the stem bark of Hypodaphnis zenkeri.
[A]:
triterpenoids