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: PURPOSE: We studied a case of vortex keratopathy that was associated with the use of atovaquone.

Output: atovaquone


Input: Consider Input: We report a case of severe hypotension associated with intravenous valproate used to treat status epilepticus in an 11-year-old girl.

Output: valproate


Input: Consider Input: Development of an extensive skin rash following a single dose of MTX may be an early warning sign for life-threatening bone marrow aplasia.


Output: MTX