In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
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Question: In vivo activity of the potent oxytocin antagonist on uterine activity in the rat.

Answer: oxytocin


Question: Safety and tolerability of denufosol tetrasodium inhalation solution, a novel P2Y2 receptor agonist: results of a phase 1/phase 2 multicenter study in mild to moderate cystic fibrosis.

Answer: P2Y2 receptor


Question: Synthesis of derivatives of methyl rosmarinate and their inhibitory activities against matrix metalloproteinase-1 (MMP-1).

Answer:
matrix metalloproteinase-1