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: Discovery of liver-targeted inhibitors of stearoyl-CoA desaturase (SCD1).
Example Output: stearoyl-CoA

Example Input: Sulfasalazine, a potent suppressor of lymphoma growth by inhibition of the x(c)- cystine transporter: a new action for an old drug.
Example Output: cystine

Example Input: Multifunctional targets of dietary polyphenols in disease: a case for the chemokine network and energy metabolism.
Example Output:
polyphenols