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]: The effect of triclosan on mediators of gingival inflammation.
[EX A]: triclosan

[EX Q]: Drug-protein interactions: isolation and characterization of covalent adducts of phenoxybenzamine and calmodulin.
[EX A]: phenoxybenzamine

[EX Q]: Influence of triterpenoids present in apple peel on inflammatory gene expression associated with inflammatory bowel disease (IBD).
[EX A]:
triterpenoids