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]: Three-Dimensional CdS-Titanate Composite Nanomaterials for Enhanced Visible-Light-Driven Hydrogen Evolution.
[A]: Hydrogen


[Q]: Dominant expression of mRNA for prostaglandin D synthase in leptomeninges, choroid plexus, and oligodendrocytes of the adult rat brain.
[A]: prostaglandin D


[Q]: Synthesis and in-silico studies of some diaryltriazole derivatives as potential cyclooxygenase inhibitors.
[A]:
diaryltriazole