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: Inhibition of Th1/Th17 responses via suppression of STAT1 and STAT3 activation contributes to the amelioration of murine experimental colitis by a natural flavonoid glucoside icariin.

A: flavonoid
****
Q: Activation of the anti-cancer agent upamostat by the mARC enzyme system.

A:
upamostat
****