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]: Analysis of mammalian alcohol dehydrogenase 5 (ADH5): characterisation of rat ADH5 with comparisons to the corresponding human variant.
[A]: alcohol


[Q]: Molecular mechanism regulating 24-hour rhythm of dopamine d3 receptor expression in mouse ventral striatum.
[A]: dopamine


[Q]: cDNA cloning and functional properties of human glutamate receptor EAA3 (GluR5) in homomeric and heteromeric configuration.
[A]:
glutamate