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.
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Question: 4-Hydroxypyridazin-3(2H)-one Derivatives as Novel d-Amino Acid Oxidase Inhibitors.

Answer: d-Amino Acid


Question: The effect of a peripheral block on inflammation-induced prostaglandin E2 and cyclooxygenase expression in rats.

Answer: prostaglandin E2


Question: The effect of triclosan on mediators of gingival inflammation.

Answer:
triclosan