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.

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

Output: losartan

Input: Consider Input: The role of long chain omega-3 polyunsaturated fatty acids in reducing lipid peroxidation among elderly patients with mild cognitive impairment: a case-control study.

Output: omega-3 polyunsaturated fatty acids

Input: Consider Input: Reinforcement enhancing effects of nicotine via smoking.
Output: nicotine