In this task, you will be given sentences in which your task is to recognize the name of the drug or medicine. Drugs are substances that change a person's mental or physical state. They can affect how your brain works, how you feel and behave, your understanding, and your senses. Although there might be several correct answers, you need to write one of them.

Input: Consider Input: Retinoic acid may increase the risk of bone marrow transplant nephropathy.

Output: Retinoic acid


Input: Consider Input: Liver disease induced by perhexiline maleate.

Output: perhexiline maleate


Input: Consider Input: Acute drug induced hepatitis due to erlotinib.


Output: erlotinib