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]: Hypoxemia associated with cimetidine therapy in a newborn infant.
[A]: cimetidine

[Q]: Stimulation of N-methyl-D-aspartate receptors modulates Jurkat T cell growth and adhesion to fibronectin.
[A]: N-methyl-D-aspartate

[Q]: Ligand binding specificities of the eight types and subtypes of the mouse prostanoid receptors expressed in Chinese hamster ovary cells.
[A]:
prostanoid