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

Output: glucose


Input: Consider Input: Jostling for position: optimizing linker location in the design of estrogen receptor-targeting PROTACs.

Output: estrogen


Input: Consider Input: Increased responsiveness of rat colonic splanchnic afferents to 5-HT after inflammation and recovery.


Output: 5-HT