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: Aripiprazole acts as a selective dopamine D2 receptor partial agonist.

Output: dopamine

Input: Consider Input: Discovery of liver-targeted inhibitors of stearoyl-CoA desaturase (SCD1).

Output: stearoyl-CoA

Input: Consider Input: Glutamate stimulates glutamate receptor interacting protein 1 degradation by ubiquitin-proteasome system to regulate surface expression of GluR2.
Output: glutamate