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: Mercury induces the expression of cyclooxygenase-2 and inducible nitric oxide synthase.

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

A: dopamine
****
Q: The inhibitory effect of the leukotriene receptor antagonist on leukotriene D4-induced MUC2/5AC gene expression and mucin secretion in human airway epithelial cells.

A:
leukotriene
****