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: NMDA receptors are not alone: dynamic regulation of NMDA receptor structure and function by neuregulins and transient cholesterol-rich membrane domains leads to disease-specific nuances of glutamate-signalling.

Answer: NMDA


Question: Interaction of silymarin flavonolignans with organic anion-transporting polypeptides.

Answer: flavonolignans


Question: Effect of nicotine pretreatment on arsenic-induced oxidative stress in male Wistar rats.

Answer:
nicotine