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.

Ex Input:
Angiotensin AT1 receptor antagonist losartan and the defence reaction in the anaesthetised rat. Effect on the carotid chemoreflex.

Ex Output:
losartan


Ex Input:
Doxorubicin decreases paraquat accumulation and toxicity in Caco-2 cells.

Ex Output:
paraquat


Ex Input:
The role of extranuclear signaling actions of progesterone receptor in mediating progesterone regulation of gene expression and the cell cycle.

Ex Output:

progesterone