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: Synergistic enhancement of cancer therapy using a combination of heat shock protein targeted HPMA copolymer-drug conjugates and gold nanorod induced hyperthermia.

Output: HPMA


Input: Consider Input: Clinical assessment of norepinephrine transporter blockade through biochemical and pharmacological profiles.

Output: norepinephrine


Input: Consider Input: The atypical antidepressant mianserin exhibits agonist activity at kappa-opioid receptors.


Output: mianserin


