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: Pharmacological evidence of functional inhibitory metabotrophic glutamate receptors on mouse arousal-related cholinergic laterodorsal tegmental neurons.

Output: glutamate


Input: Consider Input: Carnitine biosynthesis. Purification of gamma-butyrobetaine hydroxylase from rat liver.

Output: gamma-butyrobetaine


Input: Consider Input: The Intermediate-conductance Calcium-activated Potassium Channel KCa3.1 Regulates Vascular Smooth Muscle Cell Proliferation via Controlling Calcium-dependent Signaling.


Output: Potassium