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.

Example Input: Orexin-A suppresses postischemic glucose intolerance and neuronal damage through hypothalamic brain-derived neurotrophic factor.
Example Output: glucose

Example Input: Induction of heparin-binding EGF-like growth factor and activation of EGF receptor in imatinib mesylate-treated squamous carcinoma cells.
Example Output: imatinib

Example Input: Adipose tissue as a source of nicotinamide N-methyltransferase and homocysteine.
Example Output:
nicotinamide